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File type: GLTF
File size: < 10MB (Should be as small as possible)
Triangles: < 20,000 max (Should be as small as possible)
Texture: 1024x1024 (Recommended) or 2048x2048
Image Texture: Emissive (not shader allowed)
Transform Y Up
Mesh should include tangents, normals, UVs
Compression level: 6
No Light objects
No Camera objects
No Empty objects
No Animation objects
Origin: [0, 0, 0]
Scale: [1, 1, 1]
Rotation: [0, 0, 0]
Max X Offset (width): 0.01
Max Y Offset (height): 0.01
Max Z Offset (length): 0.01
1 Material mandatory
Material Alpha (opacity): 1.0
No duplicated materials
Texture format: JPEG
Texture map must be baked

Do not leave unused areas
Avoid stretched images
If the model is symmetrical or has any repeated mesh or shape, these should be overlapped
Include a 10px bleed for the UV islands
Any UV island with flat colors/textures should be overlapped
Keep UV island size relatively scale according to the actual size of the area
Avoid any stretched or curved sections for cylindrical shapes UV map
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