Lighting problems - plaid pattern

Simulacron

L-3: Simulated Member
aa
Feb 17, 2016
313
326
Hello everyone,
I have some weird problems with my lighting as you can see in the image below.
I already checked for leaks and with the "Check for Problems" tool. What can I do that there isn't that weird plaid pattern?
3DB3B8F7B007A8B1AC563B027EFAE5DD2970923D
 

Vel0city

func_fish
aa
Dec 6, 2014
1,947
1,589
@Shanghai_Minion , mind telling me what the name of that broken material is? I can make a bumpmap in like 5 minutes for it and post it on the forums.
 

Pocket

Half a Lambert is better than one.
aa
Nov 14, 2009
4,694
2,579
The reason is that 001 was made back before they introduced self-shadowed bumpmaps into Source (I guess) and it still refers to a nature/rockground001_normal that was replaced with nature/rockground001_height-ssbump at some point. But the rock wall's bump map is a normal map, and I think they have to be both one or the other for the blend material to work.