Tried copying custom textures to both SkylineSDK/Asset Library/Textures/TerrainTextures & then to SkylineSDK/Skyline/Data/Terrain/TerrainTextures paths before loading Skyline and also while it was already loaded. Still same crash when trying to change out a default terrain diffuse texture. Last resort I tried the Regenerate Resource Files under Tools menu, no luck either

Noob question - What is the preferred method for adding custom textures for use in creating new terrain materials?