Yup. Created them for bespoke textures when needed, to enable landmines etc, and to apply Phong shading.
What I haven’t seen explained though is how the “terrain” common texture is used. I notice in yours/Drakir’s Northpole that in GtkRadiant the snowy texture is represented by the “terrain” texture and I was guessing this might be related to some sort of meta-shading to render the smooth texture merging I’d like to achieve… but I’m only guessing :eek2:
If you know how to create/interpret “terrain” texture and/or achieve the texture merging I’m after, I’d be very grateful 
Thanks for your help :drink:
2Bit