LIghtmaps giving overlap errors on HIGH res settings, but not on low

Spoon

Hi PC,

What is up with this? I can bake everything fine at low settings like 32-64 LM res, but if I go to 256-512I get errors of overlapping UVs.
This happens on quite a lot of the assets in the game, and I dont understand why.

Can anyone shed some light on this?

r4ptur3

haha was that a lightmap pun?

is your level and package saved before you bake?

Spoon

Haha, no, I am not sophisticated enough to do puns in english

No, I just drag the static mesh to the default sun/day map and bake, to test if it is working. Does that make a difference? :O

EDIT: It didnt

r4ptur3

Double check to make sure your UVs are uniquely laid out, and that there are no stray UVs. My guess is there is a tiny stray UV somewhere on your mesh. When the mesh has a super low lightmap resolution the stray UV is too small to bake down. On higher resolutions the UV would be visible.

Also double check to make sure your mesh is using the correct lightmap index. Maybe it is on the wrong one?

Spoon

I check in max for both inverted and overlapping faces. Wouldn't that pick it up?
Your theory on the size makes sense, I just dont understand why I shouldnt be able to find it in Max, then.
It is using the correct index
It's just the thing about it only showing overlapping erros on higher resolution that I dont understand the logic behind, in general.
Thanks for your ideas on it

r4ptur3

you should check your meshes in UDK. sometimes the import process can scramble your UVs. Double click your asset in the content browser and look for the UV index / display UV icon in the top left. Hope this helps! Don't forget to collapse everything / freeze assets / delete history before you export

Spoon

Thanks, R4ptur3
Will try that for the next assets, and see if it makes a difference, as I normally dont collapse and freeze