I'm new. I recently grabbed an av skeleton from a game's wiki and wanted to know how I can select the uv maps separately? As in, just tapping L to highlight them. I had cut the edges of the mesh to separate it, but I ended up with this break in smoothness between parts. So I went back and marked the seams... voila! I can select them individually with L. So now the question is, how do I get it to bake ONLY the highlighted UV mapped area instead of all 3? Answered! Made multi materials. Now it's baking black:
This time I'm adding screenshots :)
Once you have your model assigned the 3 materials
1: Select the Head material.
2: In the UV/Image editor, create a new image for the head to bake to.
3: In the Node editor add a New Image node and select the Head image as reference.
Repeat for the other 2 materials.
Note: It is very important that you leave the Image node selected (highlighted) for each material. If an Image node is not selected then that material will not be baked !
4: Select all of the mesh.
5: When you have your baking options setup hit the Bake button. All 3 materials will be baked, each to its own image.
When the baking is finished only one of the three will be visible in the UV/image editor.
6: Go to the UV/Image editor and one by one select each of the three images and save them some where for later use.