[BUG] Translucent Blocks with Overlays Exhibit Strange Rendering Properties

[SaltSouls]

Right now there is an issue with the way the outline/breaking animation renders on the book bundles and their slab variants. When next to other blocks, the outline will render in such a way where you can see through it and the terrain. The breaking animation that would normally render over the blocks while breaking them is also rendering as completely transparent. I think this has to do with the bundles being made of of two overlapping cubes while also using the translucent renderer, but I'm not sure why it would be causing this as no other translucent block seems to have this issue.

From what I can tell, this seems to be a shader related issue with how Minecraft/Forge is handling their translucent blocks. That means that this is something that, without extensive knowledge of how the shaders in the game work/how to write shader code, can't be fixed by me as of current. I'm more than happy to accept any help with this problem if you think you know how to fix this issue. Until then, the blocks themselves still function perfectly fine.

[SaltSouls]

So this bug just got bigger. Apparently, the renderer for Minecraft will attempt to render, I assume, AO through a transparent block, even if said block is completely opaque. This causes you to be able to see things like, the shadows of distant trees through the book blocks when looking at them from a certain distance.

EDIT:
This seems to be caused by another mod; seeing as, when tested in the dev environment, the issue did not seem to appear there. My guess is Sodium, or some other mod that similarly touches the overall world space renderer.

[dandalous]

I believe that's caused from Sodium/Embeddium's Block Face Culling under Performance. I think it's assuming the block is full opaque when it's only partially opaque. I know something similar happened with Snow! Real Magic when it applied snow over some blocks.

[SaltSouls]

I believe that's caused from Sodium/Embeddium's Block Face Culling under Performance. I think it's assuming the block is full opaque when it's only partially opaque. I know something similar happened with Snow! Real Magic when it applied snow over some blocks.

The rendering of AO through the block is definitely a Sodium/Embeddium thing. The see through outline and no breaking animation is a Minecraft thing. I know this because one of the blocks in Mr. Crayfish Refurbished Furniture mod has the same problem as mine. Minecraft and by extension Sodium, really don't like opaque blocks using the translucent renderer. This is something that is partially fixed by using fabulous graphics, at least the see through outline, but doesn't totally solve the problem. I just need to figure out what they are doing differently with said graphics setting and then make a renderer that incorporates those changes specifically for these kinds of blocks.