[BUG] Texture Atlas anomaly causing glowing textures

[Tanks4teh]

Description of Issue

When running Minecraft while using shaders (BSL) and an HD resource pack (Misa's 64x64), some textures will inexplicably glow, despite no emissive maps being set for them in the pack. The issue is often temporarily resolved by reloading textures with F3+T, but will reappear when the game is restarted. When running the -DsaveTextureMap=true argument in the JVM parameters, the assembled atlases for both specular and diffuse textures show a potential source for the error. Inexplicable 1x1 green dots appear in the diffuse atlas, and a large black rectangle appears in the specular atlas. In this case, the black blob intersects with basalt and the top textures of barrels.

Steps to Reproduce

1. Run Minecraft with a LabPBR enabled shader and resource pack with a large degree of custom textures

OptiFine Version

OptiFine 1.19 HD U H8

Installation Method

Direct installation by running the JAR file

Log Files/Crash Reports

latest.log

F3 Debug Screenshot

Prior Testing

• Does this happen in Vanilla without OptiFine? No, as it is a problem associated with shader implementation.
• Does this happen with packs that aren't Misa's? Unsure, as most packs don't have the same featureset as Misa's in terms of CTM and shader implementation.
• Does this happen with shader packs other than BSL? Per a few people I've spoken with, yes, though I haven't tested that myself.
• Is it just barrels and basalt? In the version of the resource pack I am using, yes, though previous versions of the pack saw it occurring with anvils, azalea leaves and bamboo. More recent versions of the resource pack see the error expanded to acacia planks, acacia trap doors, activator rails and bamboo saplings. All textures affected have been proximal to this corner of the atlas.

Additional Information

The screenshots show the hand item of Basalt glowing while the block in the world is unaffected. This is because the Basalt texture in this pack has heavy CTM implementation, with the atlas anomalies not appearing anywhere near the portion of the atlas that pertains to CTM A handy highlight of the blob in question by compositing the diffuse textures over the specular textures. Full versions of the atlases will be attached below. https://www.dropbox.com/s/y5hmbwubpfqrpuc/textures_atlas_blocks_0.png?dl=0 (diffuse atlas was too large to upload directly)

[MaxiKevey]

Same issue here. This 4x4 black tiles area expands down by 1 to 4 tiles, thus covering whatever texture had that spot to begin with. How many tiles are covered seems to be random for each machine.

[MaxiKevey]

It appears to affect all shaders that support PBR materials.

[fayer3]

looked at the textures from misa 1.19a-pre this seems to be caused by the conduit wind, where the normal textures are 256x8192 animated ones, and the specular is only a single frame 64x64

[MaxiKevey]

Well it's still a bug then. This is the only texture where mismatched resolutions are a problem.