Hi Sebastian, yes the "edit uv" part kind of narrows things down somewhat.

Although another possibility might be to use a dedicated UV editing utility for that part, like UVMapper http://uvmapper.com/downloads.html there seems to be a "classic" version there for the Mac which looks like it is free, so that may be worth checking out to see if it can do the uv editing that you want.

Then that would enable you to use something like Simlab Composer for rendering which also has a Mac version I believe.

But it sounds like Modo or Cinema4D would have all of what you are looking for in just one single package so that could definitely be useful.

- Michael