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3D scene & material studio

Renderloom

Shape a scene. Find its light. Keep every idea editable.

Launch Renderloom → Tutorials

Renderloom is a free local 3D scene and material studio. Arrange editable solids, save camera shots, compare light rigs and render six diagnostic passes with the shared Kerfwise concept renderer. Texture Lab turns local images into height, normal, roughness, occlusion and metalness maps for compatible 3D applications; Figure Lab, shared with Panelcraft, adds original stylized parametric figures, and Voxel Desk builds colorful models on a three-dimensional grid. Save editable scenes, texture recipes, rendered PNG/SVG images and OBJ/STL geometry without an account.

Free · runs in your browser · no sign-up · Version 1.4.2

Screenshots

Features

  • A scene of your own

    Build from boxes and cylinders or open an existing Kerfwise Form Studio model. Edit exact placement, dimensions, rotation, colors, tags, visibility and locks.

  • Repeat with arrays

    Arrange independent copies of a selected solid in a line or around a vertical axis, preserving its finish and keeping the whole operation undoable.

  • Find the light

    Control light direction, elevation, softness, ambient light and exposure. Compare four light rigs while the scene, camera and seed remain fixed.

  • Frame the idea

    Use quick world-axis views, frame a selected solid or fit the visible model, and keep up to eight named orthographic camera shots. Image pan and zoom are independent of the scene camera.

  • Inspect six passes

    Beauty, base color, surface normals, depth, light visibility and object IDs help diagnose geometry and lighting. Workers show progress and support cancellation.

  • Texture Lab

    Create deterministic texture maps from a local PNG, JPEG or WebP. Adjust height levels, normal strength, roughness, occlusion and seamless edge blending, then keep the source and recipe together.

  • Voxel Desk

    Build and paint colored voxels on editable slices with a shaded isometric preview. Merge adjacent colors into editable scene solids or export voxel projects and geometry.

  • Figure Lab

    Create stylized figures with editable joints, start from eight pose starters, keep your own poses locally and export a four-view reference. Insert editable solids for scale and composition.

  • Simple finishes

    Use matte, satin or metal per solid. Source colors are preserved. Texture maps export separately for 3D applications that support them.

  • Four original starting scenes

    Explore a studio corner, courtyard pavilion, terraced forms or an L-shaped counter. Each scene includes editable solids, notes and saved cameras.

  • Keep the work editable

    Undo and redo up to forty edits, autosave locally and reopen the five latest scenes. Download native project files or use Save As with the browser file picker.

  • From concept to delivery

    Download PNG or image-based SVG renders, print to PDF, export OBJ/STL geometry and save reusable Form Studio models or render recipes.

  • Shared engines, useful tools

    Reuse scene previews, sampling budgets, profile extrusion, model reports, light comparisons and texture calculations through usefulweb forms, JSON API and MCP.

  • On your device

    Scene editing, rendering, texture processing and browser autosave run locally. No login, remote render service, runtime package or external font is required.

Templates

Start from a ready-made project and change it to fit.

Built-in tools

Renderloom uses these tools. Each one also has its own page and works on its own, in the browser, through the JSON API and through MCP.

For AI agents

Renderloom runs on a deterministic engine. The same functions are available as tools with a JSON API and MCP, so scripts and AI agents get exactly the results the app shows.

  • Voxel Height Grid Builder – Build an editable voxel model from rows of integer heights.
    Tool page · POST https://renderloom.usefulweb.app/api/v1/tools/renderloom-voxel-height-grid/calculate · MCP renderloom_voxel_height_grid
  • Voxel Model Inspector – Inspect a native voxel model and export its surface mesh.
    Tool page · POST https://renderloom.usefulweb.app/api/v1/tools/renderloom-voxel-inspector/calculate · MCP renderloom_voxel_inspector
  • Scene Light Rig Comparison – Compare four deterministic light rigs on the same 3D concept.
    Tool page · POST https://renderloom.usefulweb.app/api/v1/tools/renderloom-light-rigs/calculate · MCP renderloom_light_rigs
  • Height Grid to Material Maps – Turn numeric height samples into normal, roughness, cavity and ORM maps.
    Tool page · POST https://renderloom.usefulweb.app/api/v1/tools/renderloom-height-material/calculate · MCP renderloom_height_material
  • Texture Tile Seam Checker – Measure opposite-edge jumps and feather a reusable numeric texture tile.
    Tool page · POST https://renderloom.usefulweb.app/api/v1/tools/renderloom-tile-seam/calculate · MCP renderloom_tile_seam
  • 3D Scene and Render Pass Preview – Light a Kerfwise concept and inspect beauty, color, normals, depth and object IDs.
    Tool page · POST https://renderloom.usefulweb.app/api/v1/tools/kerfwise-scene-preview/calculate · MCP kerfwise_scene_preview
  • Render Sampling Budget – Compare image size, sample workload and a simple sampling-noise estimate.
    Tool page · POST https://renderloom.usefulweb.app/api/v1/tools/kerfwise-render-budget/calculate · MCP kerfwise_render_budget
  • Footprint to 3D Solid Extruder – Turn a simple footprint into a closed 3D solid with OBJ, STL and editable geometry.
    Tool page · POST https://renderloom.usefulweb.app/api/v1/tools/kerfwise-profile-extruder/calculate · MCP kerfwise_profile_extruder
  • 3D Form Model Report & Export – Measure a form model by tag and export its geometry as OBJ or STL.
    Tool page · POST https://renderloom.usefulweb.app/api/v1/tools/kerfwise-model-report/calculate · MCP kerfwise_model_report

Build a project through the API, then open it in the app with a link to https://renderloom.usefulweb.app/app#project=<base64url JSON>.

Import & export

Import

  • Voxel project JSON
  • VOX 150 (single opaque model subset)
  • Renderloom scene JSON
  • Kerfwise Render Desk recipe JSON
  • Kerfwise Form Studio JSON
  • PNG/JPEG/WebP texture source
  • Renderloom material JSON
  • Figure project JSON in Figure Lab

Export

  • Voxel project JSON
  • Single-model VOX 150
  • Voxel preview SVG/PNG
  • Voxel OBJ with MTL colors
  • Renderloom scene JSON
  • PNG render
  • Image-based SVG render
  • Print/PDF
  • Light comparison SVG
  • Kerfwise render recipe JSON
  • Kerfwise Form Studio JSON
  • OBJ mesh (mm)
  • STL mesh (mm)
  • Plan SVG
  • Texture map PNG
  • Renderloom material JSON

Keyboard shortcuts

Keyboard shortcuts in Renderloom
KeysAction
Ctrl/Cmd + SSave scene
Ctrl/Cmd + Shift + SSave as
Ctrl/Cmd + OOpen scene
Ctrl/Cmd + Z / Shift + ZUndo / redo
Ctrl/Cmd + YRedo
Ctrl/Cmd + C / VCopy / paste solid
Ctrl/Cmd + DDuplicate solid
DeleteDelete selected solid (preview or object list focused)
Arrow keysNudge by the grid, Shift = ×10 (preview or object list focused)
FFit image (single-key shortcut, can be switched off)
RRender preview (single-key shortcut, can be switched off)
?Help and shortcuts (single-key shortcut, can be switched off)

Frequently asked questions

What is Voxel Desk?

A local voxel editor with a slice grid, indexed colors and a shaded isometric preview. Import and export a single opaque VOX 150 model, or export a voxel project and color-preserving OBJ/MTL geometry. VOX scene graphs, materials and transparency are not imported. Adjacent same-color voxels can be merged into editable scene solids if they fit the 128-solid scene limit. The preview is not path tracing.

Does Renderloom replace a full production renderer?

It is a compact concept studio using orthographic rays, direct light, soft shadows, ambient occlusion and one metal reflection. It does not offer path tracing, glass, EXR or arbitrary mesh imports.

Can I use my existing Kerfwise work?

Yes. Open a Form Studio project or Render Desk recipe directly. Export the same reusable formats from Renderloom to continue in Kerfwise. The original Kerfwise desks remain available.

Are Texture Lab maps rendered on scene solids?

The concept renderer uses source colors and matte, satin or metal finishes. Texture Lab exports maps and editable recipes for applications that support textured materials; it does not apply PBR maps to this renderer.

Are Figure Lab figures anatomical human models?

They are stylized parametric reference solids for proportion, staging and scale. They are not MakeHuman meshes, medical anatomy, skinned characters or animation rigs.

Where are scenes saved?

The five latest scenes autosave in this browser. Save editable project files for backups, transfer between devices and long-term storage.

Limitations

What Renderloom does not do (yet):

  • At most 128 solids and 4096 visible triangles; page renders allow 384000 pixels and 6 million pixel samples.
  • Orthographic concept rendering only: no path tracing, glass, arbitrary mesh import, EXR or distributed rendering.
  • Texture maps export separately; the renderer supports source colors and three simple finishes.
  • Figures are stylized reference solids without anatomical guarantees, skinning or animation rigs.
  • OBJ/STL exports keep separate overlapping solids; they do not perform boolean unions.
  • Browser storage can be cleared. Download project files for a durable backup.

Tutorials

Learn Renderloom step by step.

  1. Your first scene and renderBuild a small editable 3D concept, set a camera and export a local render.Beginner 6 min
  2. Arrange solids and save camera shotsWork with units, grid snapping, exact transforms and reusable camera views.Intermediate 7 min
  3. Compare light and inspect render passesUse four light rigs, deterministic sampling and six diagnostic passes.Intermediate 8 min
  4. Add texture studies and figure referencesUse Texture Lab and Figure Lab alongside an editable scene.Beginner 8 min
  5. Build and export voxel modelsSculpt colored block models slice by slice, import VOX files and send the result to your scene.Beginner 9 min

Ready to try it?

Launch Renderloom →

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