3D Assets Requirements

3D assets requirements

Level 1 (3D Viewer)

• formats:

  • .glb (recommended)

  • .gltf

  • .fbx

  • .obj

• model-units: meters

• materials: PBR roughness metallic

• uv maps:

  • tiling uv maps

  • material atlas

  • unwrapped uv maps

• file coordinate system:

Upload

The glb format contains all files for a given model including texture maps. If you choose this format you just have to upload the .glb file.

In case you choose another format make sure to include all necessary files like texture maps along with the 3d model within a zip file and upload this.

information gltf/glb format

• Version 2.0 (see specification for details)

• Supported extensions

  • Texture transforms (KHR_texture_transform )

  • Unlit materials (KHR_materials_unlit)

Levels 2+ (3D Material Configurator, 3D Product Configurator)

• formats:

  • .obj (recommended)

  • .ply

  • .crt

• model-units: millimeters

• materials: need to be uploaded/created separately (more information)

• uv maps:

  • the uv space units are treated as 0 to 1mm real world scale

  • the correct scaling is done later in the material settings and or roomle script

  • How to apply the needed UV Scaling

Geometry

• Must-have

  • Manifold meshes.

  • Correct and consistent up­* and forward­-axis.

• Recommended

  • Quads and triangles only.

  • Keep the pivot/center point in the lower center of the object’s bounding box.

  • Keep the root transform at the scene’s origin with no rotation or scaling applied.

  • Back-facing polygons are culled (only one side is visible) keep that in mind.

  • Objects can contain multiple materials and sub-­objects in a hierarchy.

  • Sub­-objects of the same material should be merged/joined together to save draw calls at runtime.

UV mapping

• Must-have

  • Whenever textures are applied, correct UV layouts have to be provided. For til

  • For configurable objects the UVs must be scaled according to Rubens Configurator specifications

• Recommended

  • If the object uses specular shaded materials, normal maps or reflections provide either custom tangents or a UV ­map to make sure the specular highlights are consistently correct.

UV requirements for the Rubens Configurator:

• In Roomle one UV unit equals to 1 mm on the model. To achieve this, lay out the UVs in a way that a texture map with a size of 1 x 1 mmis mapped onto the object in its correct size.

Materials & Textures

You may provide textures for the following channels

• diffuse (with or without alpha channel)

• normal

• metallic

• roughness

• occlusion

Must-have

• JPEG or PNG Images

• No special characters in (file) names (see Naming convention below)

• Make sure the texture file paths in the 3D file are relative and correct. Otherwise they are not guaranteed to be assigned.

We automatically optimize images for real-time rendering by scaling them down and limit the total number of textures.

Additional real-time notes:

• Images are scaled so that the pixel size is a power of two (eg. 32, 64, 128, 256, 512 or 1024 Pixel)

• A lossy image compression is applied

Keep the automatic down-scaling in