Hooray, fourth time is the charm I'm pretty sure I had surface hiding working at some point. I've probably broken it, but it should be an easy fix. I didn't think anybody used the GLA override so it's not included in the user interface. It's easy enough to add back in - the code's still there, it's just not accessible. And I think the double-sided thing was removed in anticipation of working shaders. I'll add it back in for the time being. Yay, first time is the charm on Mac I think the you're describing the same problem as @@Kualan. Should be an easy fix! And yes, I was looking for a new/better logo. I'm not sure whether I like the M and V logo or if it can be made to look a bit more stylized some how.