UVs:
channel 1 - overlappingchannel 2 - non-overlapping (for lightmaps baking)Textures: For UE4 and Unity engines. (PBR). Resolution: 4096 x 4096 px (TGA).
Unreal Engine 4: optimized RGB mask which includes M, R, AO.
Discord community and support: https://discord.gg/9RuYt8yyrD