block surfaces are generated under stairs and steps

Your texture pack seems to have a glass texture in place of wooden planks, stone bricks, cobblestone, and part of the off-state redstone repeater. Is this causing your problem?

I think he want to prove that other blocks are rendererd below (normally) non-transparent blocks by replacing the normal textures by glass.

not really Anon Ymus, i mean the block texture under a step ore a stairs must not be generated pointless if you can not see it, right?

you are right kumasasa but what if it even with normal texturepacks

The stairs and steps are counted as transparent for the game, the other blocks are solid and in that case it is unnecessary to render the blocks below.

Perhaps Minecraft does render "hidden" surfaces if the texture has transparency. If Minecraft only rendered "visible" blocks as per your suggestion, a piece of glass on the ground would have blue instead of transparency.

minecraft just doesnt see the difference between blocks that are visible when placed next to stairs/slabs and blocks that are not visible. if a block is partly transparent then minecraft will render all 6 blocks around it. could be considered a bug but i think that testing which blocks should and which blocks shouldnt be rendered wont make the game much faster. atleast for stairs that will be the cause if you would ask me. slabs are easier because there is only 1 extra block that doesnt have to be rendered and that block can be only below or under the slab.

Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.

Please do not mark unreleased versions as affected. You do not have access to this yet.

Assuming no longer an issue, no response in 8 months.