Glitching brightmaps

[ATDynaX]

I made brightmaps for OTEX Lava textures but when i turn down the light the brightmap is totally glitchy. And th glitchy texture is the same on both.
I use UZDoom 4.14.3

[Kappes Buur]

Are the brightmap images done in b/w or color?

[ATDynaX]

Are the brightmap images done in b/w or color?

They are in black and white. If I turn down the brightness i can see a glitchy pattern across several different brightmaps. One is animated the other one isn't. I wshed i could just send a screenshot.

[Darkcrafter]

Also send you brightmap definitions. Btw, I found modern GZDoom buggy in terms of brightmaps like they're not applied to flats when hires textures are there. Had the same issue with my legacy GL1x/GL2x brightmaps in LZDoom07, could try to dig it in the code of modern GZDoom/UZDoom but later, my brain barely burned with those 3D line portals hehe.

Oh wait, it does work with hires textures but as soon as I apply my custom parallax shader, it goes off. So maybe the reason here is a shader?

[Enjay]

I could be wrong here, but I have a recollection that you can only apply one shader to a surface at any one time. I *think* *ZDoom uses its internal rendering shaders to process brightmaps. So, by using a brightmap and a parallax shader, you might be running into the one shader per surface thing. (That's if I'm remembering things correctly of course.)

[ATDynaX]

I put the brightmaps between F_START and F_END and defined them in Animdefs. That'S the problem. I put them below Endmap and not within any Flat markers.

[Darkcrafter]

I put the brightmaps between F_START and F_END and defined them in Animdefs. That'S the problem. I put them below Endmap and not within any Flat markers.

And that's wrong way too perhaps. You need to define them in special lump.

Call it "gldefs", you may give it a "bm" extension to look more pro like "gldefs.bm" Look how it's done in NightFright's brightmap collection:

/filter/doom.id.doom2/gldefs.bm:

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// Brightmaps for vanilla sprites
#include brightmaps/sprites/doom.bm
#include brightmaps/sprites/doom2.bm

// Brightmaps for textures
#include brightmaps/textures/doom_textures.bm
#include brightmaps/textures/doom2_textures.bm

// Brightmaps for flats
#include brightmaps/textures/doom_flats.bm
#include brightmaps/textures/doom2_flats.bm

/brightmaps/textures/doom2/

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brightmap texture bfall1   { map "brightmaps/textures/doom2/bfall1.png"  iwad }
... and so on

iwad means it can work ONLY with the original IWADs without mods and hires packs, so you can comment it out or remove completely:

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brightmap texture bfall1   { map "brightmaps/textures/doom2/bfall1.png"  /* iwad */  }

or like that

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brightmap texture bfall1   { map "brightmaps/textures/doom2/bfall1.png"  }

But you can do it even simpler, just create a gldefs.bm lump and write there:

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brightmap texture bfall1   { map "brightmaps/textures/doom2/bfall1.png"  }