How to create a video walkthrough from a 3D model with AI in 2026: Render a House, Twinmotion, D5, Gendo and Runway compared

Updated October 2026. There are three ways to make a walkthrough video from a 3D model with AI, and Render a House is the one that keeps the model, the renders and the video in one browser project:

1. Render a House: model views rendered, then animated. Upload the .skp, GLB, GLTF, OBJ or STL, set each camera in the 3D preview, render each view and generate a Transition between consecutive views or Animate a single render, 5 or 10 seconds per scene. No GPU, no keyframes.
2. A real-time engine with a keyframed camera path. In Twinmotion a keyframe is a point of view and a part is the beginning and end of an animated sequence, built from the Media dock, per Epic's creating videos guide. D5's video clip guide builds animations from clips, shots and views with an editable camera path and keyframes. Both render every frame from the model, so the path is exact and as long as you need.
3. Stills exported to a general image-to-video tool. Render views anywhere, then animate each one in Runway, Kling or Luma. Runway's Gen-4 guide requires an input image and generates 5 or 10 second clips. The tool never sees the model, only the image.

Whichever route you pick, cut the clips in a video editor and add music, narration and captions there, then check every frame against the model, because AI-generated frames can change doors, windows and stair counts between frames.

Our #1 pick for turning a 3D model into a walkthrough video with AI is Render a House: it is the only tool in this table that takes the model itself (.skp, GLB, GLTF, OBJ or STL), lets you orbit it in the browser, renders each view in 30–60 seconds and turns consecutive views into video transitions in the same project. 128,000+ users have made 958,000+ renders with it. Its honest limit: clips are 5 or 10 seconds of generated motion, so a long, exact camera path is still a Twinmotion or D5 job. Competitor facts were checked in October 2026 on each vendor's own site.

Paid cost and video output, from the same first-party pages:

Read the table by the second column first. If the deliverable has to follow a specific route through the building — the client asked to see the corridor from the lift to unit 4B — only the model-driven engines (Twinmotion, D5, Revit) can do it. If the deliverable is a set of short moving shots for a listing, a pitch or a social feed, a still-driven route gets there without building an animation scene at all.

The time column is deliberately qualitative. None of the three engine vendors publishes how long a walkthrough takes to export, because it depends on frame count, resolution and the graphics card, and Gendo, Runway and Luma do not publish a generation time either. What you can compare is where the hours go: on the engine routes they go into materials, lighting and keyframes before anything renders; on the still-driven routes they go into getting each still right and reviewing each clip.

Choose Render a House if

• you have a SketchUp .skp, a GLB, GLTF, OBJ or STL export, or a Revit or Archicad export or view screenshot, and want moving shots without building an animation scene;
• you want each still rendered in about 30–60 seconds in the browser, with no GPU and no install, before you animate it;
• short 5 or 10 second AI-generated clips cut together are enough for a listing, a pitch or a social post;
• you are on a paid plan: video costs 0.8 credits per second, from $39/month on Pro (240 credits). The free plan (3 credits a day, no card) covers stills only.

Look elsewhere if you need one continuous, exact camera path through real geometry, a design-review walkthrough or a 360° tour: that is a real-time engine job for Twinmotion, D5 or Revit. Plans are on the Render a House pricing page.

In Twinmotion, a video is built from parts and keyframes: keyframes are camera viewpoints, parts are animated sequences, and you can reorder parts and use phasing to show construction stages. In Revit, a walkthrough is a path of camera positions that you draw in a plan or 3D view, then adjust for frame count and speed. Both render every frame from the model, so the tenth second shows the same building as the first.

AI image-to-video works the other way round. It takes one image and predicts what the next frames look like as the camera moves. It never sees your model, only the pixels of the still. That is why it needs no scene setup, and also why it can bend a mullion or grow an extra step when the camera travels further than the still can explain.

Most confusion about “AI walkthroughs” comes from asking one route to produce every deliverable. Match the route to the output instead:

• Listing reel or social teaser (15–30 s). Still to video. Three to six short clips, each from a strong still, cut to music. Nobody expects a continuous path in a reel.
• Competition or client pitch (30–90 s). Still to video for mood, with an engine shot for any moment that must be exact, such as the approach or the view from a balcony.
• Design review with the client. The model itself, in Revit, Twinmotion or D5. Reviewers pause, ask to go back, and compare options; an AI clip cannot be re-shot identically.
• Construction sequence or phasing video. Twinmotion, whose phasing tools exist for exactly this. AI video has no idea which element is built first.
• VR or 360° tour. An engine. Twinmotion exports 360° video; still-to-video tools output flat clips.

If the answer is “a bit of both”, that is normal: a short AI teaser for the listing and a keyframed engine walkthrough for the meeting can both come from the same model.

These are the steps inside Render a House, from an uploaded 3D model to a cut walkthrough, matching the product's 3D Scene and Video tools. The Render a House video transitions guide shows each screen.

1. Upload the 3D model to a Render a House project

   Upload a native SketchUp .skp directly, or a GLB, GLTF, OBJ or STL file (3D upload is on paid plans). From Revit or Archicad, export GLB, GLTF or OBJ, or export the view as a PNG, JPG or WebP image; large images are downscaled automatically. Native .rvt and PDF files are not accepted.

2. Orbit the 3D preview and set the first camera

   Open the model in 3D Scene, orbit or fly the camera to the first frame of the walkthrough, such as the approach to the front door, and render from exactly that view.

3. Render the start view in 30–60 seconds and fix it

   Pick a style (Real photo, Iso line drawing, Blueprint sketch or your own reference image) and render. Use area edits, material swaps and relighting to fix materials, planting and time of day now, because the video inherits everything in the still.

4. Move the camera and render the end view

   Back in 3D Scene, move the camera to where the shot should end, for example closer to the entrance or around the corner, and render it with the same style so materials and light match.

5. Create a Transition scene in the Video tool

   Open Video, click + Scene and choose Transition. Pick the start and end renders; select three or more renders to get one scene per consecutive pair. Choose Camera Movement (Rotate right, Rotate left or Straight cut) or Custom for a day-to-sunset, material or season change, and set 5 or 10 seconds per scene. To move inside a single render instead, choose Animate and a preset such as Pan Zoom, Aerial Reveal or Interior Walkthrough.

6. Generate, review frame by frame and download the MP4

   Each clip costs 0.8 credits per second (4 credits for 5 seconds, 8 for 10) on a paid plan and takes a few minutes. Scrub it for warping glass, bending mullions and flickering reflections, regenerate any clip that drifts, then download the MP4.

7. Cut the clips into one walkthrough

   Join the clips in any video editor with short cuts or cross-fades, in the order a visitor would walk: approach, entrance, main space, detail, and add music, narration and captions there. Render a House does not join scenes into one continuous film for you.

Two details decide most of the result. First, the still: the walkthrough is only as good as the frame you animate, so spend your iterations there, where an edit costs a render rather than a clip. Render Reboot makes the same point for Twinmotion stills — clear foreground, midground and background, clean geometry and consistent light animate better. Second, the shot list: decide before you start which rooms and views make the cut, and in which order, so you render six good stills rather than twenty loose ones.

For export specifics, the Render a House SketchUp model to realistic render guide and the Render a House Revit and Archicad to AI render guide cover views, screenshots and mesh exports for each modeller.

This clip is a Render a House video transition between two renders of the same house: the start view, the end view and the 5 second camera move generated between them.

What the video shows: the clip opens on the start render, a modern flat-roofed house with a timber-slatted upper volume cantilevered over a board-formed concrete base, full-height glazing, birch trees, ornamental grasses and a gravel forecourt, seen from the front-left corner in late-afternoon light. Over five seconds the camera moves in one continuous shot, closer to the house and round towards its front, ending on the end render. Walls, windows and the roof line stay consistent throughout, and only the camera moves; there is no audio, text or cut.

A second example, on the Render a House animate-a-render guide, uses Animate instead: one daytime render of a house becomes a 10 second clip in which the light shifts from day to dusk and the interior lights come on.

The clip inherits every decision in the still, so a little preparation in the modeller saves several regenerations later. None of this needs a render engine; it is framing and housekeeping.

• Camera at eye height for interiors and streets. A view taken from roughly standing height reads as a walkthrough; a high three-quarter view reads as a model on a table.
• Leave room in the direction of travel. If the clip will push toward the entrance, keep the entrance off the frame edge. The model can only move into space the still shows.
• Hide construction clutter. Section planes, guide lines, tags, grids and hidden layers that print in the viewport end up in the render and then move in the video.
• Give the scene depth. A foreground element — a tree, a railing, a table edge — gives the camera move something to pass, which is what makes a short clip read as movement.
• Export large. Upload the highest-resolution screenshot you can. Thin mullions and handrails survive a clean, sharp input far better than a blurred one.
• Decide the time of day once. Relight every still to the same light before animating, so clips cut together as one film rather than a morning shot next to a dusk shot.

Short, single moves survive; compound moves do not. A prompt like “slow push toward the entrance” gives the model one job. “Fly over the roof, then dive through the window into the kitchen” asks it to invent most of the building. Match the move to what the still actually shows:

For aspect ratio, pick the channel first: 16:9 for websites and presentations, 9:16 for Reels, TikTok and Shorts, 1:1 for feeds. Compose the still for the crop you will publish, because a vertical crop of a wide facade loses the building.

Here is a shot list for a detached house modelled in SketchUp, uploaded as a native .skp and rendered view by view in Render a House. It is the order a visitor would walk, with one move per clip:

1. Approach from the street — slow push toward the entrance, 10 s, 8 credits of video.
2. Front door and porch — short push-in, 5 s, 4 credits of video.
3. Living room toward the garden — slow lateral pan, 10 s, 8 credits of video.
4. Kitchen island detail — short push-in, nothing else, 5 s, 4 credits of video.
5. Double-height stair — gentle upward tilt, 10 s, 8 credits of video.
6. Garden facade at dusk — partial orbit of a few degrees, 10 s, 8 credits of video.
7. Aerial of the site from the model — slow pull-back, 10 s, 8 credits of video.

That is 60 seconds of footage for 48 video credits, plus seven stills. At 4 credits each for 4K Pro renders, the stills add 28, for 76 credits in total — about a third of a Pro month. Budget a second attempt for the stair and the kitchen: tight interiors with reflective surfaces are the clips most likely to need a retake. Cut in an editor with short cross-fades and a music track, and the result is a one-minute film for a listing page or a pitch, made without an animation scene.

Render a House video costs 0.8 credits per second, so a 5 second clip is 4 credits and a 10 second clip is 8. The still you animate is a separate render; the table assumes one 4K Pro render per clip at 4 credits, which is the most expensive render option, so it is a ceiling rather than an average. Failed renders are not charged.

Pro includes 240 credits a month for $39, or $312/yr on annual billing. Spent only on video that is 300 seconds, thirty 10 second clips; with a 4K Pro still per clip, a full 60 second cut uses 72credits, so Pro covers three such cuts a month. At Pro's monthly price each credit works out to about $0.16, which puts a 10 second clip near $1.30; extra credits bought beyond the plan are $0.20 each, or $1.60per 10 second clip. Studio's 1,000 credits at $99/mo cover 1250 seconds of video. The free tier (3 credits a day, no card) does not include video. Plan details are in the pricing docs.

The same clips on Luma's credit table

Luma publishes a per-model credit table on its pricing page. Plus is $30/mo ($300/yr) with 10,000 credits. Here is what a 10 second image-to-video clip costs on the two Ray models it lists, and how many fit in a Plus month:

So the honest comparison depends on resolution. At 720p on Ray3.14, Luma Plus fits more 10 second clips per month than Render a House Pro; at 1080p the count drops to 12 or 8. The difference that matters more for architects is upstream: Luma starts from whatever image you give it, while Render a House renders the still from your model view in the same place, so the frame being animated is already an architectural render rather than a screenshot.

An AI clip is the wrong tool when the video has to be a faithful, continuous record of the design, and a general video generator can be the better buy when there is no model at all. This is where each competitor honestly wins.

Twinmotion video

Twinmotion builds videos from keyframes and parts, per its creating videos guide, and exports MP4 by default or PNG/EXR frame sequences, at 30 fps by default with 25, 60 and 120 fps options, per its export settings. It also offers 3D, 360° and 360° 3D video modes, with 360° video up to 8K per its videos overview, and its interface is available in nine languages. The licence is free for individuals and companies under $1M in annual revenue, and $445 per seat per year above that. For a walkthrough that has to follow a specific corridor, with construction phases, it is the cheapest serious option.

D5 Render video

D5 Render lists camera movement templates, custom camera paths and keyframes, MP4 and AVI output and frame sequences up to 4K and 120 fps on its features page. Its help center says camera path editing arrived in D5 2.6, with clips, shots and views as the building blocks, video up to 4K on individual accounts and up to 8K on Team accounts. On the pricing page, Community is free with video up to 4K and 50 AI trial credits, Pro is $360/yr, and Teams is $59/seat/mo with 8K video. It is GPU-accelerated, so the workstation is part of the cost.

Revit walkthrough

Revit's walkthrough tool places cameras along a path you draw, inside or around the building, and exports AVI or an image sequence. It is already paid for if you license Revit ($380/mo or $3,005/yr, Windows only), and it is exact: it is the model. If you need presentation-grade frames rather than design-review frames, pair it with an engine such as Twinmotion, or render stills separately.

Gendo video

Gendo renders sketches and exports from SketchUp, Rhino, Revit or CAD and offers walkthrough, orbit and cinematic video on a shared canvas. Per its pricing page, the free plan covers images with a watermark at 1k export; Studio is £79/mo (£790/yr) with 15 one-off video seconds, video packs run from £40 for 100 seconds to £125 for 500, and Studio Scale (£299/mo, beta) includes unlimited video. Choose it if your team wants one shared canvas for renders and video and budgets in pounds.

Runway image-to-video

Runway Gen-4 turns an image and a prompt into a 5 or 10 second clip at 1280×720, 24 fps, for 12 credits per second (5 on Gen-4 Turbo). The free plan has 125 one-time credits and Standard is $15/mo, or $12/mo billed annually, with 625 credits. Choose it for general video work beyond architecture, such as editing footage or generating people and scenes; it does not open a 3D model or render the still for you.

For a side-by-side, see Runway vs Render a House.

Every still-to-video tool, Render a House included, shares the same three limits. None of them is a bug that the next model release will quietly remove; they follow from generating frames instead of rendering them.

Exact camera control

You set the start and end frames and a direction. You cannot set a focal length change at second four, a path around a column, or a speed curve, and you cannot repeat the exact same move on a second design option to compare them. If a reviewer will ask for “the same shot, but with the brick facade”, render it from a keyframed path in Twinmotion or D5.

Geometry fidelity

The frames are predictions from pixels, not projections of your model. Geometry is generally preserved in the still, but it can shift, and motion adds more chances for it to shift: window mullions bend, stair counts change, a balustrade thins out, a door appears where the still showed a wall edge. Check openings, roof lines and thin elements in every clip. AI video is a concept and marketing format, not a measured or contractual walkthrough, and it does not replace BIM or CAD.

The practical check is simple: open the model next to the clip and compare the frames where the camera stops. Count the windows on the facade, the risers on the stair and the posts on the balustrade. If a count changes, regenerate with a shorter move or cut the clip before the drift starts.

Length

Clips are 5 or 10 seconds in Render a House and in Runway Gen-4. A two-minute film is a dozen clips, each starting from its own still, joined in an editor. Joins between clips are cuts, not a continuous camera, so plan the film as a sequence of shots — the way an estate agent video is edited — rather than as one unbroken walk.

1. Animating a weak still. A flat, low-contrast screenshot does not improve when it moves. Fix materials and light in the still first.
2. Asking for too much motion. Long orbits and fly-throughs force the model to invent unseen faces of the building. Keep each move short.
3. One long clip instead of several short ones. A sequence of 5–10 s shots, each from its own still, holds together better than any single long generation.
4. Skipping the frame-by-frame check. Warped glass and bending mullions are easy to miss at full speed and obvious to a client who pauses the video.
5. Presenting it as the design record. Label AI clips as visualisation. For anything a client will sign off against, show the model or drawings.

Our pick: Render a House for turning a 3D model into short AI video walkthrough clips in the browser — upload the .skp or GLB, render each view in 30–60 seconds and generate transitions between them, with no GPU and no animation scene. Choose Twinmotion or D5 if you need a long, continuous, exact camera path, construction phasing or 360° video; choose Revit if the walkthrough is for design review inside the BIM model; choose Gendo if your team wants a shared canvas for renders and video; choose Runway or Luma for general-purpose video from any image.

How to create a video walkthrough from a 3D model with AI

Use Render a House, the AI architectural rendering tool: upload the model (SketchUp .skp directly, or GLB, GLTF, OBJ or STL), orbit the 3D preview to each camera position, render each view in about 30-60 seconds, then create a Transition in the Video tool between consecutive views, 5 or 10 seconds per scene, and join the MP4 clips in a video editor. Video is on paid plans at 0.8 credits per second, so a 10 second clip costs 8 credits. The motion is AI-generated between renders, not a real-time walkthrough; for an exact, continuous camera path use Twinmotion, D5 or Revit.

Can I upload a SketchUp or Revit file directly to make a video?

In Render a House a native .skp file uploads directly. Native .rvt files are not accepted; export a Revit model as GLB, GLTF or OBJ, or upload a PNG, JPG or WebP image of the view. 3D model upload is on paid plans.

How much does an AI architectural walkthrough video cost?

On Render a House video costs 0.8 credits per second: 8 credits for 10 seconds and 48 credits for a 60 second cut made of six clips. Pro's 240 monthly credits at $39/mo cover 300 seconds of video if you spend nothing on stills. The free plan (3 credits a day, watermark, no card) covers stills only, not video.

How long can an AI walkthrough video be?

Each generation is short: 5 or 10 seconds per scene in Render a House and 5 or 10 seconds on Runway Gen-4. A 60 or 90 second walkthrough is six to nine clips cut together, not one continuous generation.

Can I control the exact camera path in an AI video?

Partly. In Render a House you set the exact start and end views in the 3D preview and pick a camera direction, but the frames in between are generated. For an exact, repeatable path, keyframe it in Twinmotion or D5, or draw a walkthrough path in Revit.

Is Render a House better than Twinmotion or D5 for walkthrough videos?

For short, polished clips of approved views made in the browser with no GPU or animation scene, Render a House is faster. For a long, continuous walkthrough along a precise path, construction phasing, 360° video or design review, Twinmotion and D5 are better, because they render every frame from the model.

Can I make an architectural walkthrough video with AI without a 3D model?

Yes. Render a House accepts hand sketches, floor plans and photos or existing renders as well as 3D models, and Gendo, Runway and Luma also animate images. The camera-path routes in Twinmotion, D5 and Revit all need the full model.

Is AI video good enough for real estate and marketing?

For teasers, listing reels and early client presentations, yes, provided every clip is checked for geometry drift. It is not suitable as a measured or contractual record of the design; the frames are generated, not rendered from the model.

• Render a House for real estate renders and marketing videos covers how listing stills and short clips fit into a property marketing plan.
• SketchUp model to realistic render with Render a House walks through the export and render steps that produce the still you animate.
• Revit and Archicad to AI render with Render a House does the same for BIM models, including which views to export.
• Render a House 3D model viewer opens a GLB, GLTF or OBJ in the browser so you can check a view before rendering it.
• Twinmotion pricing, compared with Render a House breaks down the licence if you need the camera-path route instead.
• Best AI video walkthrough tools for architecture, with Render a House compares model camera paths with image-to-video generators.
• The fastest way to make client presentation renders covers the stills you would animate when the meeting is close.
• Render a House floor plan render starts from a 2D plan image when there is no model to export.
• Floor plan to render workflow walks through the full plan-to-image process step by step.
• Free AI rendering tools for architects compares what each free tier includes before you pay for video.
• AI alternatives to Enscape and Lumion explains where a browser tool replaces a real-time engine and where it does not.
• Render a House and the best AI rendering tools for architects ranks the AI renderers that produce the stills in the first place.
• AI rendering for landscape architects applies the same render-then-animate route to gardens and public space.
• Render a House as a Twinmotion alternative and D5 Render vs Render a House compare the engines head to head.
• Gendo vs Render a House for AI video walkthroughs compares Gendo’s canvas video with transitions from saved model views.
• Twinmotion vs Render a House for walkthrough videos compares keyframed paths with AI transitions between renders.
• Render a House 3D preview docs cover uploading a model and orbiting the camera.
• Render a House FAQ answers account, credit and file-format questions not covered here.