There are a couple of interesting issues I've encountered in C8 that I thought I'd bring up here.

A friend of mine sent me a file with a bunch of gemstones that he couldn't get to render the way he wanted.  It's a C7 file which I opened in C8.  I made extensive modifications but the most interesting thing is that if I turn on indirect lighting, the gemstones render completely and fully black (weird).

I've tried a few things to deal with it but I couldn't get it figured out.

Another problem I've discovered comes from skylight.  If you put a bi-gradient into the background, put white into the first color, black into the second and set the horizon to 90, what you get is a background that goes from white at the top to black at the bottom.  I really like to use this for GI skylighting.

What I found is that all surfaces on the bottom render as completely black!  The fix is to set the first box to white in the bi-gradient and the rest of the boxes to black and the horizon to 89 degrees (and bang it's fixed).

So, weird.  I'm glad I can fix up the GI skylighting thing but the GI indirect light issue is weird.

Not sure if it's a translation issue from C7 or not.  My friend uses Shoestring shaders and I don't have that.  Maybe opening up a file with that plug-in setup in another version of C that doesn't have it tweaks it somehow.

-Kix