Some shrubs from some mods don't work with transparency resulting in black spots.

Screenshots courtesy of @dreamhack who found this on latest version using mod "Project: Vibrant Journeys"
I personally seen this with "Terrafirmacraft" back when SSAO was just added, but the issue appears to be the same.

DH will take a shrub, decide that it's semi-transpatent like glass, water, or ice, and then apply that transparency to a grass block underneath, which causes a dirt/stone blocks deeper to be visible, and since they don't have any skylight, they appear as black spots on the hills.

cola98765OP•3/9/24, 12:12 PM

the problem with Project: Vibrant Journeys is short grass

cola98765OP•3/9/24, 12:12 PM

what's interesting is that it's dependant on the position. some blocks X,Z coordinates are gonna have more trnasparency than others

cola98765OP•3/9/24, 12:13 PM

(the whiter the square the more transparent it is, there is only void below)

cola98765OP•3/9/24, 12:24 PM

I also found a vanilla case of this bug, tinted glass

cola98765OP•3/9/24, 12:26 PM

left is just tinted glass (which as a mechanic blocks all light)
right is short grass causing the grass block under it to go transparent

cola98765OP•3/9/24, 12:27 PM

interestingly below cave culling height, it looks like this

cola98765OP•3/9/24, 12:28 PM

so 2 problems:

light on continous vertical strip while adjacent to semi transparent block
some grass additions on top will make the brass block transparent if they have semitransparent pixels

cola98765OP•3/9/24, 12:34 PM

Ccola98765 the problem with Project: Vibrant Journeys is short grass

cola98765OP•3/9/24, 12:34 PM

this is explained by the fact there are 7 short grass textures

cola98765OP•3/9/24, 1:46 PM

not to dive into the code

cola98765OP•3/9/24, 1:49 PM

here you decide how the transparent block behaves, and includes part on translucent blocks

GitLab

common/src/main/java/com/seibel/distanthorizons/common/wrappers/blo...

This is a mod that adds a Level Of Detail (LOD) system to Minecraft. This implementation renders simplified chunks outside of the normal render distance allowing for an...

cola98765OP•3/9/24, 1:51 PM

either later on it's not interpretted correfctly, or blocks like tinted glass and other blocks like it is set to fully transparent

Ccola98765 Click to see attachment

cola98765OP•3/9/24, 2:34 PM

some of those use almost invisible pixels
normal vs gamma 5

cola98765OP•3/9/24, 2:44 PM

however on this gamma 2 example you can see that pixels are or are not transparent, there is no try.

cola98765OP•3/9/24, 3:05 PM

behavior seems to be the same across vanilla, Sodium, and Optifine

cola98765OP•3/9/24, 3:08 PM

it seems that the one pixel that is visible in the last example has alpha=32, all others are hidden

cola98765OP•3/9/24, 3:08 PM

and the more I dig the more I find

cola98765OP•3/9/24, 3:12 PM

from left: tinted glass, stained glass, ice, glass

cola98765OP•3/9/24, 3:13 PM

stained glass is fully opaque from top, while normal glass is fully opaque from all directions
EDIT: stained glass only appears fully opaque from top, but that's only the case in daylight with white variant

cola98765OP•3/9/24, 3:21 PM

never realised that stained and tinted glass gad semi transtapert border, as obviusly normal glass is only made of fully opaque pixels which casuses the issue where it's opaque

cola98765OP•3/9/24, 3:25 PM

both stained and tinted glass have their own textures (stained one is per color even), and the workaround with treating pixels that are >32 alpha as solid won't work as those glass have most pixels at around 100

cola98765OP•3/9/24, 3:37 PM

here it seems that block is never asked what opacity mode it is, resulting in transparent grass and opaque glass as it's still set to ignore transparent pixels completely, while preserving semitransparent ones

GitLab

common/src/main/java/com/seibel/distanthorizons/common/wrappers/blo...

This is a mod that adds a Level Of Detail (LOD) system to Minecraft. This implementation renders simplified chunks outside of the normal render distance allowing for an...

cola98765OP•3/9/24, 3:59 PM

I use faithful as base textures, so vanilla might not be as clear in the end.
both have background set to alpha=2, left one uses one of the colors from border, the other is just black