Gulith421
(Gulith42)
March 23, 2025, 2:51pm
1
Hi,
In an empty new level, i put a simple sphere with an emissive red material glowing by multiplying color x1000.
UE5.3.2 (can’t upgrade right now)
normal result :
with Color {1 , 0.04, 0}
weird result(with or without post-process ) :
with Color {1 , 0, 0}
the emissive is ■■■■■■ up with pure Red color … why?
light is emitted but the surface doesn’t glow.
if i make if glow x10000, we get:
[DELETED]
what’s happening?
Gulith421
(Gulith42)
March 25, 2025, 1:03pm
2
Anyone ever encounter any of this?
also tried to update drivers, didn’t work.
I haven’t come across this before but I can try to help!
What is your material setup? Is it set to Unlit/Lit?
Does the emissive look incorrect in the Material Preview? (Not in the actual map)
Gulith421
(Gulith42)
March 28, 2025, 2:17pm
5
sorry about the second part of the problem: it was my fault.
it was a post process Kuwahara filter still on …
well it shouldn’t do that, but it was it.
however the first part is still weird:
why does high emissive with pure color does this? is it normal? (lit or unlit)
i got same result in preview windows
Is it possible for you to share the material setup? (including material editor, preview images and material instance setup)
Gulith421
(Gulith42)
March 28, 2025, 5:26pm
7
it i just a basic unlit material:
Hm… I have never used Substrate materials (I believe its still in experimental mode).
This is how I’ve setup the non-substrate material. Is it possible for you to try the same setup without a Substrate material setup? Just to rule out issues.
Gulith421
(Gulith42)
March 28, 2025, 6:14pm
9
you tried with the wrong color
try with RGB{1, 0, 0}
it only appears with pure color like that for me.
and try with 10000 glow mult
edit: tried without substrate, and it does the same
1 Like
You are correct! My mistake! I get the same result with RGB(1,0,0). Though, the threshold to get it to appear the center to glow varies.
What I mean is if I set the value to RGB(1,0.0001,0), it doesn’t make the center glow.
It would need to be something like RGB(1,0.01,0) in order for that glow effect to kick-in.
I wonder if its some type of limitation of PBR. I also have no clue now, sorry!
Gulith421
(Gulith42)
March 29, 2025, 10:33pm
11
ah!! so it’s not just me!
it might be intended … i mean that way you can have a “red glow” instead of having a red glow that turns white.
Yeah it feels intentional. I don’t understand shaders enough to know why it would be the case.
Perhaps, you can work around it for your case?
Gulith421
(Gulith42)
March 30, 2025, 12:49pm
13
yeah i just don’t use pure color if i want lots of glows.
i wanted to know if it was normal .. or something was wrong
1 Like