Lightmapping artifacts

Hi

I’m baking the lightmap with Beast but it is creating some strange artifacts in the limits of various object’s meshes.

alt text

The option “Generate Lightmap UVs” is active for all models.
Do you know why this happens and how can I fix it?

Thanks in advance

That looks to me like texel blurring of the lightmap texture. It will probably help to make your lightmap higher resolution.

Here is a great article describing texels and mipmapping.


edit

I just checked out the Lightmapping window and it has another option that can help you in that situation. Raising the Scale in Lightmap value from the Object tab should make the selected object larger on the lightmap effectively raising it’s resolution while not increasing your whole lightmap size. Everything else will get smaller (lower resolution) to make up for it so you may see more of this blurring on other parts after doing this. After a while balancing the scale values of the objects that are affected you should wind up with an acceptable lightmap… or realize you just flat out need more pixels and bump up the resolution anyway.