If you are playing with materials and trying to do transparency with specular maps, you may have run into problems. The problem came up on Plurk and Geenz, the one coding the project, replied in the comments on Inara Pey’s site.
After some testing, it seems that you can get specularity with diffuse maps with alpha masking, but not with diffuse maps with alpha blending. I don’t know what the intended behavior is, but that’s how it works at present.
The intended behavior (eventually) is that alpha blended objects will be able to support both normal mapping and specular mapping. Currently this is a work in progress, and due to its current state, it hasn’t been added to the viewer just yet.
UPDATE: 4/10 – [16:02] Open Source Meeting – Geenz Spad:
So yeah, be on the lookout for materials on semi-transparent objects, it’s coming, I’ve even been working on it for the past week; don’t mope about it not being there too much.
The emphasis in this article is on Specular Maps. This is something many of us have little knowledge about. But, the specular map is going to be far more complex than the normal map. This is the area where knowledge will be key to making nice object textures or great object textures.