I guess this is because he has A7 Extra (?).
Exactly
What exactly is render-to-texture doing, or wanted to do?
I think it may be possible without a DLL, or shaders, at least with A7 lite-c.
Do you mean have a camera, and what it sees gets put into a models texture?
If you want it for A7 C-script ignore me...
Back in A6 ages r2t.dll was used to make the A6 below pro edition to use view.bmap. Now, I know that you can use it in A7 Com and above, but I only have A7 Extra.