Found this on my travels
A simple tool for editing Splatmap by painting on meshes.
- Work with Unity 5
- Work with any mesh
- Source code available
- 14 shaders included (4Diff, 8Diff, 12Diff, 4Bump, 4BumpDisp, 4BumpIllum, 4BumpSpec, 4DiffColor, 8DiffColor, 12DiffColor, 4BumpColor, 4BumpDispColor, 4BumpIllumColor, 4BumpSpecColor)
- Can export a flat texture from the Splatmap