Hello yet again! :)
So another really big issue with the bump maps that kind of make Corona not production ready at all :\
Turns out that if you are using bump maps without nesting them in the Corona Bitmap first you get about a 50% speed penalty. As soon as you nest it in a CBitmap then the rays jump back up again.
I'm attaching a quick video illustrating an issue. Do note that the scene is really simple - Imagine getting a speed penalty like this on a scene that needs 4 hours to render :\
Anyway, using the CBitmap by itself isn't a problem but CBitmap doesn't work with the Layer shader and because the Projector shader is broken too (see my other bug reports) you basically _can't_ scale bump maps in Corona for Cinema 4D. I hate to be negative here but thats like... A super basic thing to do.
Tough stuff :(
OS: Windows 10