Attached Link: http://www.chesco.com/%7Ecjcigas/tutorial/grouper/index.html

The problem is that Bryce usually sets ambience to black and 100%. You need to map the ambience channel to the texture and set it to a sensible value (depends on the diffusion). Contrary to KenS, you don't have to go through each mesh part. Use Grouper and you can do all parts that share a common texture at once.