Sprites 'glow' intense RGB colours with Dynamic Lighting

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Sprites 'glow' intense RGB colours with Dynamic Lighting

Postby AschTheConjurer » Mon Aug 12, 2019 11:06 pm

I've had this recurring problem with sprites, in multiple versions of GZDOOM when Dynamic Lighting is enabled.
This happens across a few different versions, across any number of mods/maps (though I don't know every single one off the top of my head), and it happened both on my old PC that had no GPU (using an Intel HD4600 integrated chip) and on my new-ish PC (which has a very old nVidia GeForce 210 GPU on the latest drivers, I'm looking to upgrade soon for obvious reasons).

I actually forgot about this problem for a very long time because I usually play DOOM engine games without Dynamic Lighting for performance reasons, but switching it back on for Ashes: 2063's underground areas has reminded me that this has been a thing for at least the last 5-odd years of my using GZDOOM.

Example of the RGB 'Glowing' Sprites compared to how they look normally:
[imgur]https://imgur.com/a/oFJxPVZ[/imgur]

The colours the sprites 'glow' is different depending on - from what I can tell - what kind of transparent texture I'm looking through.
In situations outside of the images above, I can mostly replicate the issue in the same mod (Ashes: 2063) in a number of locations:
- In the same map, looking through a window paints sprites dark blue
- In an earlier map, standing in a bathtub and looking through a translucent shower curtain-type texture turns sprites bright yellow

As I said though, this occurs in many mods and on many maps, and the only thing I can see in common is that it has to do with seeing sprites through translucent/transparent textures, especially when standing on the (line? sector? i'm not actually sure of the right nomenclature) of the transparent texture itself (as I have done with the sunlight coming through the ceiling in the Images linked above, turning sprites bright red).

OTHER STUFF THAT MIGHT BE USEFUL:
+ I can confirm that these sprite issues do not happen if Dynamic Lighting is disabled
+ Images taken playing ASHES: 2063 in GZDOOM 4.1.3
+ Using OpenGL renderer
+ Lighting is set to not affect sprites or particles in display options
+ Forcing Tranparency settings to "Vanilla" does not help
+ I can upload a [user].ini file that has a readout of all my GZD settings if that would help anyone figure out what's going on
AschTheConjurer
 
Joined: 04 Sep 2018
Discord: #8884

Re: Sprites 'glow' intense RGB colours with Dynamic Lighting

Postby Graf Zahl » Mon Aug 12, 2019 11:49 pm

Do you have Bloom enabled?
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Graf Zahl
Lead GZDoom Developer
Lead GZDoom Developer
 
Joined: 19 Jul 2003
Location: Germany

Re: Sprites 'glow' intense RGB colours with Dynamic Lighting

Postby AschTheConjurer » Tue Aug 13, 2019 6:48 pm

Graf Zahl wrote:Do you have Bloom enabled?


I double checked and no, bloom is disabled, as are all other postprocessing options in the same menu.
I pretty ritualistically go into the options in any new game (and GZDoom 4+ when I got it) and disable pretty much all settings related to Posts, motion blur, etc.
AschTheConjurer
 
Joined: 04 Sep 2018
Discord: #8884

Re: Sprites 'glow' intense RGB colours with Dynamic Lighting

Postby AschTheConjurer » Tue Aug 13, 2019 10:46 pm

@Grahf Zahl

I've been playing through Ashes a bit more. I've added more pictures to the imgur album, because the bug has been very weird to replicate.
The last couple of screenshots are taken while standing in the same spot, but simply turning in place makes the bug occur and go away.

https://imgur.com/a/oFJxPVZ
AschTheConjurer
 
Joined: 04 Sep 2018
Discord: #8884


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