Real-time hair and fur for Godot 4. This is a native port of AMD TressFX 4.1 written as a GDExtension in C++: the strands are simulated on the GPU with compute shaders, skinned to your animated Skeleton3D, kept out of the character's body with signed distance fields, and drawn as thin ribbons with proper hair lighting. It runs in the editor too, so you can tune a hairstyle while the animation plays.