# SketchUp + AI: Diffusion, Plugins and Concept Massing in 2026 **SketchUp's built-in AI and the plugin ecosystem around it do one job well: they render a model you have already built. SketchUp AI Render (the feature formerly called Diffusion) and Veras both start from your viewport and return an image. What they cannot do is decide what to model, and modelling is the expensive part of concept work. The alternative in 2026 is to generate the model from words and references, with walls, openings and rooms as classified elements, and bring it into SketchUp as GLB or OBJ. Use AI Render when the massing is decided and the look is the question; use a model-from-words tool when the massing is the question.** This is the massing-focused follow-up to our earlier pieces on [SketchUp AI Render](/blog/sketchup-diffusion-vs-dedicated-ai-concept-tools/) and the [SketchUp concept-to-handoff workflow](/blog/ai-sketchup-workflow/). Those cover rendering and process. This one is about where the geometry comes from. --- ## The landscape: three kinds of "SketchUp AI" There are three things people mean when they search for SketchUp AI, and they do not compete with each other. They sit at different points in the work. ### 1. Render what you modelled: AI Render and Veras **SketchUp AI Render.** Trimble's in-app feature, launched under the name Diffusion in SketchUp Labs and later renamed. Frame a view, write a prompt, choose a style, generate. Newer versions add reference images, negative prompts and inpainting, and it runs on Desktop, Web and iPad. Generations draw from a monthly credit allowance tied to your subscription tier and shared with SketchUp's other AI features; the free tier has none. The tool is a reinterpretation of the viewport rather than a geometry-locked render: wide shots hold up, close-ups sometimes invent a different building. For a mood image before tomorrow's review it is the right answer. **Veras.** EvolveLAB's plugin for SketchUp, Revit, Rhino and Vectorworks. Same starting point, a viewport, with more control: a slider for how strictly to respect your geometry, material and colour preservation, region-based rendering, and the same interface across the four hosts. If your office lives in several of those programs, the consistency is the selling point. Pricing is per seat; check the vendor for current tiers. Both are honest tools. Both need a model first. ### 2. Help while you model: assistants and connectors Trimble has begun connecting SketchUp to conversational assistants so that geometry can be placed from instructions, and third-party extensions have experimented with prompt-driven modelling for years. These are worth watching, and worth being sceptical about: a prompt-driven push-pull is still push-pull, one operation at a time, and it does not know what a wall is any more than SketchUp does. The genuinely useful version of this, in our view, is not "SketchUp that listens" but a model that is *written* rather than drawn, which is the third category. ### 3. Generate the model, then bring it in The third kind starts before SketchUp is open. You describe the project, attach references, and receive a model whose elements were created as building elements: this is a wall, this is a window in that wall, this is the living room with an area of 56.8 m². The model can be edited by words or by sliders, plans and sections come out of it, and it exports as GLB or OBJ for SketchUp, DXF for AutoCAD and IFC4 for Revit or Archicad. That is what [Nuit's 3D mode](/3d/) does (open to every account from the Images | 3D switch in the studio). The rest of this article is about when it makes sense next to the first two categories, and how the SketchUp handoff actually works. --- ## Render-over-model versus model-from-words The difference is not image quality. AI Render, Veras and Nuit's image modes all produce presentable concept images. The difference is what exists at the end. | | AI Render / Veras | Nuit 3D | |---|---|---| | Starts from | A SketchUp model you built | A brief plus reference images | | Output | Image | Parametric model (script + parameters) | | Editing | Re-prompt, re-render | Change a parameter or instruction; geometry, plan and sections update | | Consistency across views | Each render is independent | Every view is the same model | | What SketchUp receives | Nothing; the render is the end | GLB / OBJ with named groups | | Cost of exploring five massings | Five models, five render sets | One brief, five branches | | Where it stops | Needs geometry to exist | Concept-stage geometry only; no construction detail | The last row matters. Nuit's model is early-schematic: correct footprints, wall heights, openings, roof, rooms, structure at the level of columns and beams. It is not a detailed SketchUp model with mouldings and skirtings, and it is not trying to be. The right mental model is "the massing arrives built, with the rooms in it", not "the model is finished". --- ## The handoff into SketchUp ### Export From the model's Export menu, choose GLB (single binary file, scene hierarchy and materials preserved) or OBJ (wider compatibility, flat hierarchy). Export is free and unlimited; the cost is in generating the model (60 to 150 credits, estimate shown first) and in prompt edits (5 to 25). Sliders, direct manipulation, plans, sections and export cost nothing. ### Import SketchUp Pro imports OBJ through *File → Import*. Recent versions also import glTF/GLB; if yours does not, use OBJ. Two settings to check: - **Units.** The model is in metres. Set the import units to metres; a 20 m house arriving as 20 inches is the classic first-import mistake. - **Merge coplanar faces.** Turn it on for walls and slabs; it reduces the triangle count SketchUp has to display. ### What you get With GLB, the scene arrives as nested groups named after the elements in the script: walls, beams, columns, roof, each opening, each room volume, deck, railings. Library assets (trees, furniture, lamps) come in as component instances; the Mirror Lake House example carries 24 pines from the asset library, each about 27,000 triangles, so hide the planting group while you work. Materials arrive as SketchUp materials carrying the model's colours; where a scan material was applied in the studio, expect its colour map at best, not the full PBR set. The studio's catalogue is 1,775 CC0 PBR scans from ambientCG plus a small curated set, applied by picking a material and the elements it targets, and it is in the studio viewport, not in SketchUp, that those materials look like the scan. ### What you do not get No IFC classes or quantities (those are in the IFC4 export), no dimensions or drawing layers (those are in the DXF), no SketchUp-native tags or scenes. The geometry is triangulated in places where the model built meshes rather than extrusions, mostly cladding boards and site; walls, slabs and structure are clean solids. For the AutoCAD and BIM sides of the same export, see [AutoCAD + AI](/blog/autocad-ai-2026/) and [AI to Revit](/blog/revit-ai-ifc-concept-to-bim/); for how a plan feeds the model, [From an AI Floor Plan to a 3D Model](/blog/ai-floor-plan-to-3d-model/). For what a DXF from the model actually contains, [What's Inside an AI-Generated DXF](/blog/dxf-layers-ai-export-what-architects-get/). --- ## When to use which **The client has approved a scheme and wants to see it in a different cladding.** AI Render. The model exists; frame the view, prompt, done. Do not export anything anywhere. **Your office renders from SketchUp, Revit and Rhino and wants one tool.** Veras. Consistency across hosts is its job. **You have a brief and no model, and three directions to show on Thursday.** Nuit. Generate the concept images first (exterior, plan, interiors, all from one brief, consistent with each other), pick a direction, generate the model, adjust, export GLB. The SketchUp model you open on Thursday morning already has the rooms in it. **The project is a renovation of a building you have surveyed.** SketchUp first. Model the survey; use AI Render or Veras for options over it. A model-from-words tool does not import your survey (Nuit takes images as references, not DWG or SKP as geometry), so it can inform the concept but cannot start from your measured drawing. [AI Renovation Visualization](/blog/ai-renovation-visualization/) covers the image-side workflow. **You want a massing to test on the site.** Nuit's model, then GLB into SketchUp with your terrain. Or, if the question is yield, setbacks and parking rather than form, a feasibility tool; [AI Site Feasibility and Massing vs Concept Design](/blog/ai-site-feasibility-massing-vs-concept-design/) draws that line. **You need construction detail.** Neither. This is where SketchUp Pro and LayOut, or your BIM tool, do the work AI does not. --- ## A worked sequence Take the Mirror Lake House on the [examples page](/3d/examples/). The brief was two sentences: an elongated single-storey house on a rocky lake shore, long narrow volume, low gable roof, lake end cantilevered over the water on slender steel columns; about 120 m² with an open living room and kitchen at the lake end, two bedrooms, a bathroom and an entrance hall at the land end. Four saved concept images were attached as references. The model came out at 20 × 6 m, floor 1.4 m above the water, wall height 2.7 m, gable at 14°, standing seam at 460 mm centres, steel columns 120 mm on concrete pads. Five rooms, 110.4 m² total. One instruction, "extend the cantilever over the water by 2 m", turned out to be an existing parameter and cost nothing; "add a small terrace with a railing at the lake end, under the roof" needed new geometry and cost 11 credits over two steps. Both versions are kept as branches. In SketchUp, the GLB opens as the house, deck, columns, roof, lake surface, rocks and pines, grouped by name. The same day's work in SketchUp alone would have been the modelling; the rendering would still be ahead. Here the modelling is behind, and AI Render is available for a mood image if you want it, from a model you did not have to draw. --- ## The honest limits - Nuit's model is concept-stage. Rooms, openings, structure and roof; not joinery, not services, not details. - No SKP export and no plugin; the route is GLB or OBJ through the standard importer. - No DWG or SKP import into Nuit; references are images and text. - One storey per export at present. If your work starts with a model you already have, SketchUp's own AI is the better answer and there is no reason to add a tool. If it starts with a brief, generating the model saves the step you were about to do by hand. --- ## Frequently Asked Questions ### What AI is built into SketchUp in 2026? SketchUp AI Render, formerly Diffusion: an image from your viewport plus a prompt, with style, reference, negative-prompt and inpainting controls, funded by a monthly credit allowance on paid tiers. It renders geometry you modelled; it does not create geometry. ### What does Veras do that SketchUp AI Render does not? Finer control over geometry and material fidelity, region rendering, and the same interface inside SketchUp, Revit, Rhino and Vectorworks. It also starts from a viewport of an existing model. ### Can AI build a SketchUp model from a description? Not inside SketchUp, though conversational connectors are appearing. A separate tool can generate a parametric model from a brief with classified elements and export GLB or OBJ, which SketchUp imports with named groups. ### Should I model in SketchUp first and then render with AI, or generate first? If the massing is settled, model and render. If the massing is the question, generate directions first and model once one is chosen. ### What format should an AI-generated model use for SketchUp? GLB (hierarchy and materials) or OBJ (wider support, flat). SketchUp Pro imports OBJ; recent versions import glTF/GLB. Neither carries BIM classes; IFC does. ### Does Nuit have a SketchUp plugin? No. Browser tool, file export, standard importer. No live link, no SKP. The 3D mode is open to every account. ### What does a GLB from Nuit contain when opened in SketchUp? The scene as named geometry with materials: walls, beams, columns, openings, roof, room volumes, library assets as instances. No IFC classes, quantities or dimensions; those are in the IFC4 and DXF exports. --- **Try Nuit free — 300 credits (12 images), no card required.** Generate the concept images, then download the [Mirror Lake House GLB](/3d/examples/) and open it in SketchUp before you commit a project to the 3D model. [Start your project →](https://nuit.archi)