Too bad we can't create our own multi-layered image format to combine the main/transparent map, glowmap, and shine/env, all in one image, and use DDS type compression capabilities. Granted, it would make for one massive file, and we'd probably need out own editor program to create them, but it would reduce the number of render passes. Since some people feel like 8-bit is sufficient for glowmaps, while others prefer to keep the full color ranges available, there would need to be more than one format. 72-bit for the 8-bit glowmap, and 84-bit for the version with 24-bit glowmaps. Granted, if/when we get normal maps enabled, we'd probably want to have a format for that later, so we'd need another 24-bit for that, so that'd make 98-bit for the 8-bit glowmap and 108-bit for the 24-bit glowmap. Too bad it can't be done right?