A 3D Mesh Editor & Texture Painting Tool built using Unreal Engine 5 (runtime, not Editor).
Originally developed by rms80, who you can also find on Twitter. Claude Code also contributed extensively.
More info (and installable binaries) at www.cotangent.io
See NEW_MACHINE_SETUP.md.
Note that to get a 'full' build you need a UE5.5 fork, which is only accessible if you have accepted the UE5 EULA, and then you need to contact gradientspace and we can share the changes with you. However, the project will (should) build without those changes - the App will just be sorta broken in some aspects.
The main app code is MIT-licensed. There are various dependencies with other licenses.