Lighting artifacts on indirect lighting (help) / UDK

keku645

Hi! Before anyone asks why I'm using UDK rather than UE4 is because UDK allows me to export lightmaps which i can later import them in another engine (Mirror's Edge related modding which also uses an older version of UE3 without lightmass).

The thing I'm encountering is a lot of lighting artifacts which i can't get rid off, I also did a lot of research such as this post by Endfinity Jon: 

https://polycount.com/discussion/101005/nasty-lightmaps-help

This didn't solve my problem either so maybe asking help here might help.







Things to clarify:

-I always build light in Production mode.
-Tried with 4096 resolution & 0.15 Static Lighting Level Scale.
-Whole scene is in a single level.

I'd like to get a really clean lighting, having really long baking times is not a problem while i can get a clean lighting.

eCstatic

It looks like compression artifacts

keku645

Update:

Well guys I finally could solve it by editing the BaseLightmass.ini and setting bAllowLightmapCompression=False.

You can see how clean the lightmaps are now with no compression.

Obscura

Please note that uncompressed textures use 4x more video memory.

cupsster

Obscura said:

Please note that uncompressed textures use 4x more video memory.

From pictures it looks like he is using specific art style that saves a lot on textures so in this specific case it might be acceptable. But yeah, making lightmaps uncompressed usually results in much smoother and crisp lighting at the expense of memory.