Thanks for the comments people.
![:)](http://192.241.182.11/images/smilies/smile.png)
Performance is good, runs fine on my machine (and I've had no complaints from others so far). The brightness in those shots isn't upped or anything, those are engine-generated .jpg's.
In-game the brightness is fairly ok I think, a tad dark but it's clear where you can go and where not, so at least the important parts receive enough lighting (methinks).
I'm not going for heavy drilling machinery, this is more a place for carefull argeological carving. Some stacks full of ancient carved stones and pottery could do, I think. I plan to rework the tomb a bit, too, so more shots are coming soon.