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It's a DDS file. Image programs like makeIntensity() don't work on compressed images. |
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Thanks for that insight, VanishedOne. Neither 2.07 nor 2.08 contains, in the standard distribution, stain01b_s.tga, only stain01b_s.dds . So perhaps the MakeIntensity call was bad before, but the error wasn't reported to the console until 2.08. I didn't find any copy of stain01b_s.tga within the FMs I have locally (not at all a complete set). Since the whole point of stain01bwet is evidently to use MakeIntensity, if that can't happen, probably it needs to be dropped from future distributions. |
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If any released maps have used that material, it can't really be dropped; a missing material would render black, I think. Either the material decl needs to change or someone with assets SVN access needs to add the missing .tga. Since the image appears to be monochrome anyway, I'm not sure makeIntensity() is actually needed (its definition from idDevNet: 'Copies the red channel to the G, B, and A channels'). |
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Clearly the intention from the name "stain01b_wet" is to simulate, say, a beer spill on a bartop. I don't know if that was ever successfully realized. |
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See here: https://forums.thedarkmod.com/index.php?/topic/20291-beta-testing-208/&do=findComment&comment=446849 If you remove the "makeintensity" keyword, you will see the decal flicker. Prior to 0005044 this material didn't work at all. When it was enabled, the flicker arrived too. |
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I'm having trouble reproducing this flicker on my machine, even after reverting to TWOSIDED_DECAL_MACRO. I did manage to find some on the stairs just before the chute in St. Lucia, but then it persisted if I set the specularmap to _white and turned DECAL_MACRO off, so I'm guessing the decals are coplanar with the stairs and that makes a light-interactive decal z-fight. |
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I've seen other decals z-fight when coplanar too (e.g., straw). Probably the guidance to mappers needs to change, to avoid coplanarity in those cases. Maybe add a warning in the DR viewer with those? More tediously, scan & revise old FMs to remove coplanarity for those decals? |
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This material was first broken by 0005044, which applied specular color to specular light. Nbohr1more "fixed" it by replacing .tga image with .dds, which was simple replaced with black texture because DDS textures don't support image programs. Then with 0005781 image programs started working with DDS textures, so the flickering has returned. At least at the Saint Lucia mission (near the statue). In my opinion the best idea now is to set specular texture to black (or specular color to zero), and thus return the state of things in 2.09 at least. |
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I think I found the core reason behind all of this. Our C++ code for interactions rendering NEVER sets polygonOffset. As the result, all interactions with polygon-offset-ed surfaces (i.e. decals) on solid surfaces are doomed to cause depth fighting. I tried to add polygon offset there, and it helps for Saint Lucia map. |
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Sounds promising |
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SVN revs 16426 and 16427. We changed specularmap on this material to _black because: 1) It removes depth fighting. 2) It restores the original appearance of this material (the one it has in TDM 2.00). It turns out that specular lighting never worked on it. Trying to actually support specular term on polygon-offsetted surfaces is extracted to 0005868. Internal discussion: https://forums.thedarkmod.com/index.php?/topic/21231-stain01bwet-interactions-and-polygonoffset |
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Thanks for the deep dive. |
- Anonymous
