Exporter Options

Extensions and Compression

Review the exporter controls that emit optional glTF extensions or compression workflows.

Open Exporter Overview Install the Plug-in View Supported Features

Extensions section of the glTF2.0 Export options panel with Draco Compression expanded — The **Extensions** section: Mesh Quantization and Draco Compression. Extra Draco controls appear when Draco is on.

Mesh Quantization¶

Disabled by default
Enables KHR_mesh_quantization
Useful for reducing vertex storage size
Should be tested against your runtime and asset-quality requirements

Draco Compression¶

Disabled by default
Enables KHR_draco_mesh_compression
Can reduce mesh size significantly
The exporter exposes presets and manual quantization controls

Draco Presets¶

Fast: Highest precision, lighter compression
Balanced: Default preset
High: Stronger compression
Maximum: Smallest files, most aggressive settings
Custom: Manual control of every slider

Advanced Draco Controls¶

Strip Uncompressed
Compression Level
Position Bits
Normal Bits
Texcoord Bits
Color Bits
Generic Bits

KTX2 Compression¶

KTX2 settings appear when Texture Format is set to KTX2 Format.

KTX2 Controls¶

Quality: Low, Medium, High, Maximum
Format: ETC1S, UASTC, ASTC 4x4, None
Supercompression: Zstandard toggle
Generate Mipmaps: Auto-generate mip levels

Texture Transform Export¶

When supported texture nodes contain UV transforms, the exporter writes KHR_texture_transform and registers it as required so the output file explicitly records the transform dependency.