Bug: Lightmapped4way results in weird problems

[THE_Sito]

Hello! New here, but definitely not to mapping. I've been mapping for over a decade at this point. I recently returned to Source engine after a long time in UE and it's been well...challenging. One of the issues I'm facing is with Lightmapped4way materials for displacements. There's this strange error where, if a displacement is viewed at a certain angle, the fourth texture (ALWAYS the fourth) gets very dark, and turns either brown or a muddy blue. There also looks to be some other texture mapped onto it, I sometimes see striations. I've checked the .vmt and couldn't find anything off about it.

[URL="https://imgur.com/a/1dAbO"]https://imgur.com/a/1dAbO[/URL]

As you can see, the problem is pretty glaring.

Here is my vmt:

[QUOTE] Lightmapped_4WayBlend
{
"$basetexture" "militia_classic/rockblend01"
"$surfaceprop" "rock"
"$texture1_lumstart" "0.0"
"$texture1_lumend" "0.5"

"$basetexture2" "militia_classic/sand01"
"$surfaceprop2" "sand"
"$texture2_lumstart" "0.0"
"$texture2_lumend" "0.5"
"$texture2_blendmode" "0"
"$texture2_blendstart" "0.8"
"$texture2_blendend" "0.9"
"$texture2_uvscale" "[1.0 1.0]"

"$basetexture3" "militia_classic/sand02"
"$surfaceprop3" "sand"
"$texture3_blendmode" "0"
"$texture3_uvscale" "[2.0 2.0]"
"$texture3_lumstart" "0.0"
"$texture3_lumend" "0.05"
"$texture3_blendstart" "0.8"
"$texture3_blendend" "1.0"

"$basetexture4" "militia_classic/sand03"
"$surfaceprop4" "sand"
"$texture4_blendmode" "0"
"$texture4_uvscale" "[2.0 2.0]"
"$texture4_lumstart" "0.0"
"$texture4_lumend" "0.2"
"$texture4_blendstart" "0.9"
"$texture4_blendend" "1.0"

"$lumblendfactor2" "0.5"
"$lumblendfactor3" "0.7"
"$lumblendfactor4" "0.4"
}
[/QUOTE]

Any help is greatly appreciated. I'll definitely stick around and help whoever I can with their issues. Cheers!

[Grenade Man]

You seem to have a lot of parameters in your vmt. Maybe remove any non essential lines and test it out to see wether those are causing issues

[THE_Sito]

[QUOTE=Grenade Man;52934848]You seem to have a lot of parameters in your vmt. Maybe remove any non essential lines and test it out to see wether those are causing issues[/QUOTE]

Hey there, I recreated the .vmt using VMT Editor 1.3.9 but the issue persists. I think what I will do as a workaround is to simply use the first three textures and disregard the fourth, blending between three textures is better than just two, I suppose. If I ever find a solution I'll be sure to post it here.