ouille, juste have a look at "output.tri" ("willou.exe --model output.tri" for instance). You'll see how it's build: regular diffuse map with a "mixed" lightmap. This is multitexturing, and Raydium handles it.
vicente : warning, having diffuse and lightmap on the same texture is, most of the time, unusable (except for very small models), because you'll need huge textures to cover the whole scene with enough details (diffuse map UV coords are shared with lightmap UV coords). When using multitexturing (separate UV coords for diffuse and light maps), you don't have this trouble, and the lightmap needs way more details (and can be very blurry without any trouble).
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