Choose an unwrap policy

When a 3D model is uploaded to Glossi, texture coordinates (UVs) determine how textures map onto the model's surfaces. If a model has missing or broken UVs, textures may appear stretched, misaligned, or entirely absent in the studio.

Glossi's unwrapping setting controls how texture coordinates are handled during model upload. You can configure this at the workspace level so it applies to all future uploads.

What Is Unwrapping?

Unwrapping is the process of generating texture coordinates for a 3D model. Think of it like unfolding a 3D surface into a flat 2D layout - this flat layout tells the rendering engine how to apply textures to each part of the model.

Most 3D models exported from design tools already include UVs. However, some CAD formats and certain export workflows may produce models with missing or incomplete texture coordinates. The unwrapping setting lets you decide how Glossi handles these cases.

Unwrapping Options

You can configure the unwrapping strategy from Settings → Workspace → Model Upload.

Auto-detect (Recommended)

Glossi checks each uploaded model and only creates texture coordinates when they're missing or broken. This is the default and recommended option.

When it does, every part gets the same real-world scale, so a material shows the same grain size on a large panel as on a small handle. Parts that already carry a texture are never changed, so a scanned or textured model keeps its look.

Always Unwrap

Glossi processes texture coordinates on every upload, even when the model already has valid UVs. Textured parts are still never changed. Untextured parts with good UVs keep their layout and are only rescaled to the same real-world scale as the rest of the model; parts without usable UVs get new ones.

Use this if materials appear at different sizes on different parts of your models.

Never Unwrap

Glossi does not intentionally regenerate texture coordinates. This keeps the source UV layout in the conversion path, but models with missing, incompatible, or broken UVs can still display incorrectly until you fix the source.

Use this if your source UVs are intentional and you do not want Glossi to regenerate them.

When to Change the Setting

The default Auto-detect setting works well for most workflows. Consider changing it if:

• You see texture issues on most uploads - Switch to Always Unwrap to regenerate UVs consistently.
• You want your source UVs used exactly as exported, with no rescaling - Switch to Never Unwrap.
• You're uploading CAD files (STEP, STP, STL) - These formats rarely include UVs. Auto-detect or Always Unwrap will produce better results.

Note Changing the unwrapping setting only affects future uploads. Models that have already been processed are not re-unwrapped.