What data types are used for uvs?

[joshuacwilde]

Just got thinking how if it used 16 bit floats for uvs, that would save half of memory space for UVs instead of using 32 bit floats. Anyone know?

[bgolus]

That’s already the default. In Player Settings there are options for Vertex Compression, which defaults to enabled for TexCoord0. That means it’s using 16 bit UVs.
https://docs.unity3d.com/Manual/class-PlayerSettingsStandalone.html#Optimization

Unity - Scripting API: VertexChannelCompressionFlags.TexCoord0

Similarly there are Mesh Compression options per Model to reduce this further.

Unity - Manual: Model tab

Unity - Scripting API: ModelImporterMeshCompression

[joshuacwilde]

@bgolus

That’s already the default. In Player Settings there are options for Vertex Compression, which defaults to enabled for TexCoord0. That means it’s using 16 bit UVs.
https://docs.unity3d.com/Manual/class-PlayerSettingsStandalone.html#Optimization
https://docs.unity3d.com/ScriptReference/VertexChannelCompressionFlags.TexCoord0.html

Similarly there are Mesh Compression options per Model to reduce this further.
https://docs.unity3d.com/Manual/FBXImporter-Model.html#meshprops
https://docs.unity3d.com/ScriptReference/ModelImporterMeshCompression.html

Wonderful! I thought I remembered seeing something about this. There doesn’t appear to be per mesh optimization options, but I think global will work ok for us. Thanks!