Bottom of waterlogged blocks shows water texture

This issue relates to MC-127004.

This is even the case for slabs and stairs as well.

This isn't a bug. You can see the waterlogged texture from all other sides, so why should the bottom be any different? The Z-fighting issue is MC-127004.

"You can see the waterlogged texture from all other sides" this is not true, the back of waterlogged stairs shows no water, only on distanced because of the ticket you mentioned, but not up close, unlike the bottom.

FVbico, the reason why the z-fighting occurs on the bottom face is the same as MC-127004, the model of the water block is incorrectly placed/sized. There is more precision in the front of the depth buffer, I.E. things closer to you are rendered more accurately than things that are rendered further away. When you go far enough away, the water model and the block model begin to occupy the same space. Two primitives occupying the same space cause z-fighting, It doesn't matter if it happens far away or close up.

This ticket is not about z-fighting, it says:
"Bottom of waterlogged blocks shows water texture"

This is intended, if we didn't see the water texture on the bottom of the sign for example, then we would see the sky (or the top face of the water block).

Confirmed in 1.15-pre1, 1.15 base (1.15.0), 1.15 randomly throughout, and in 1.16 snapshots

Issue Not Resolved

@unknown can you show a screenshot in 1.16.2? with F3 screen enabled

Can confirm that it always happens in 1.16.4 and 21w03a with transparent blocks, and sometimes with non transparent

I think full transparent blocks needs waterlogging support as well - I guess this will fix this issue, and also will have clear view (without blue tint) like shown here: