I recently got to mess around with the refraction in Toolbag 3 (really nice addition to the soft), trying to mimic the behaviour of heat emitted by an engine. Everything's fine on the refraction effect itself, but one thing I'm stumbling over is to obtain a transition from totally transparent to "hey it's refractive". It seems the refraction preset doesn't allow it, and looking at the official video the mask slot isn't meant to be used that way.
I tried to add a custom shader, copy-pasting the shaders from the "transparency" folder to the "custom" one, but without success.
So do I miss something ?
Or is it maybe possible using some tricks ?
I didn't found anything addressing this subject so far, sorry if there is
Thanks a bunch!