Texel density modifier made for blender with geometry nodes. Updates in real-time as you model and can be applied when exporting.

Also check out my uv unwrap modifier. They make a great combo.

Requires Blender version 3.5 beta or greater.

How to Use

Select a mesh and add a "Geometry Nodes" modifier.

Select "GN_Texel_Density". Set the texture size, the texel density and the UV map name.

If you check the "apply modifiers" checkbox when exporting to fbx then you can export with texel density without having to apply your modifiers.

Asset Library

If you use the asset library you can find it under the "Enno/uv" folder.

If you're looking for a texel density addon I recommend Texel Density Checker. If you would like to know more about texel density check out this article by Timothy Dries.