Roblox UGC
Roblox mesh size limits explained
Every rejected mesh upload comes down to one of four numbers. Bookmark this page — these are the 2026 limits Roblox actually enforces during moderation.
Triangles per mesh
MeshParts cap at 21,000 triangles. UGC accessories cap at 10,000. Meshlox auto-decimates while preserving silhouette so you never breach the limit.
Texture and material limits
Diffuse textures are limited to 1024×1024 PNG. Normal, roughness and metallic maps share the same cap. Each accessory can carry up to 4 SurfaceAppearance materials.
Bounding box limits by category
Roblox enforces different bounds per attachment type:
- Hat / Face / Front / Back / Waist / Neck / Shoulder: 4×4×4 studs
- Hair: 4×5×4 studs
- Wings (Back): 8×6×2 studs
- General MeshPart: 2048 studs on any axis
Why bigger isn't better
Roblox streams meshes over the network. A 20,000-triangle hair looks marginally better on desktop and terrible on Quest. Meshlox targets ~6,000 triangles for hair and ~4,000 for hats — the sweet spot for cross-device performance and moderation approval.
Ready to build?
Skip the manual work — Meshlox handles it end-to-end.