Transfer Light Sprite Glitch

[ChickenLegz]

This is what it looks like in gl_lightmode=2 "DOOM" in a sector with AS: 50 transfer light.

screenshot.jpg (123.53 KiB) Viewed 290 times

In Legacy and Software there's no problem with this,
but on Standard, Bright, Dark and Doom sprites keeps dark even in the bright region.
Is it a bug or a limitation?

demo.wad

(2.54 KiB) Downloaded 11 times

[Graf Zahl]

Looks correct for me in my latest build. What version is this? And what graphics card?

[ChickenLegz]

It's GZDoom v2.1.1.0, but I'm not sure which build it is.
I think the trouble lies at gl_distfog parameter.

When using sector lighting mode at Software:

scr1.jpg (141.34 KiB) Viewed 284 times

When using sector lighting mode at Standard
with gl_distfog at 400:

scr2.jpg (147.05 KiB) Viewed 284 times

When using sector lighting mode at Standard
with gl_distfog at 70:

scr3.jpg (172.75 KiB) Viewed 284 times

If you want the Graphics details:

---

Renderer: Intel(R) HD Graphics 5500
Vendor: Intel
Memory: 1024 MB
Version: 4.3.0 - Build 10.18.10.4013
Shading language version: 4.30 - Build 10.18.10.4013


Max texture size: 16384 x 16384
Max vertex texture image units: 32
Max texture image units: 32
Max geometry texture units: 32
Max anisotropic filtering value: 16
Max viewport size: 16384 x 16384
Max Clip Distances: 8
Max samples: 8


Extensions: 207

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Core features
v3.0 (100 % - 23/23)
v3.1 (100 % - 8/8)
v3.2 (100 % - 10/10)
v3.3 (100 % - 10/10)
v4.0 (100 % - 14/14)
v4.1 (100 % - 7/7)
v4.2 (100 % - 13/13)
v4.3 (100 % - 23/23)
v4.4 (40 % - 4/10)
v4.5 (0 % - 0/11)

OpenGL driver version check (Current: 4.3.0 - Build 10.18.10.4013, Latest known: 10.18.10.4013):
Latest version of display drivers found
According the database, you are running the latest display drivers for your video card.

No ICD registry entry
The current OpenGL driver doesn't expose the SOFTWARE/Microsoft/Windows (NT)/CurrentVersion/OpenGLDrivers registry entry. Unable to detect the driver version, driver revision name and filename.

Extension verification:
GL_EXT_color_subtable was not found, but has the entry point glColorSubTableEXT
GL_EXT_paletted_texture was not found, but has the entry point glColorTableEXT
GL_EXT_paletted_texture was not found, but has the entry point glGetColorTableEXT
GL_EXT_paletted_texture was not found, but has the entry point glGetColorTableParameterfvEXT
GL_EXT_paletted_texture was not found, but has the entry point glGetColorTableParameterivEXT
GL_ARB_compatibility was not found, but is available in driver version 10.18.10.4013

[Graf Zahl]

Definitely fog related. Why are you 400? It's rather high...

[ChickenLegz]

Yes, I know, but I'm aiming for dark and creepy rooms (about 64 brightness level) where you see a monster once about 256 map units away, not 1024.
Anyhow, Is this a bug or just a limitation?

[Graf Zahl]

Bug. The sprite splitting code only sets fog once, not per light slice as it should.