Blotchy Lightmaps

beancube

Hey guys,

Found a few previous threads similar to the problem im having but nothing for solving this.


*Ive turned the Indirect Normal Influence to 0.000

*LM UV's are spaced cleanly and that back cupboard mesh is set to 1024*

Not sure what else could be causing this random effect?
It seems only to be on a handful of meshes in the scene - the rest are as expected

Thanks in advance, BC



Textured view in the link if you want.
http://www.beancubeoflove.com/APARTMENT.html

Jeff Parrott

Are the UVs stretching? I've fixed similar issues with making sure the UVs aren't stretching.

Oniram

in the scene im working with, i get that issue mostly with 1 of 2 things.. reflective maps, and emissive lights. so far either of them are prone to give blotchy lightmaps. i dont know why but just as a test try taking off the refletion map (or at least it looks like u got one), and see if it gives the same result.

beancube

cheers guys, ill have a look over my materials. I think i was playing with emmissive on the cupboards before.

Post up a conclusion a bit later!

beancube

Updated to March Build of UDK.
Was previously using an early 2010 build...haha!

The lighting was pretty jacked when coming over, so im starting again

Ive replaced the main light with a "DominantDirectional" ((before was using a default Directional) which has seemed to fixed a hell of alot of the random blotchiness since in my previous shot.

See how i go from now on, cheers.

beancube

Alright guys im back again! haha

Was able to reproduce the problem , and found the setting causing this.



Under the LightMass properties - Checking the Ambient Occlusion Tickbox will cause the random blobs on my meshes. The only affected meshes were mainly the cupboards as this 1 object is made out of many elements.

Any of you tech savvy dudes could explain why these kinda of meshes play up?
( also dont seem to see much difference with the AO turned in this instance)

Back to Udk'n then, cheers.

Snight

You could try turning down the Indirect Normal Influence boost in the Lightmass world properties and see if that fixes your problem.