Some questions

[rxznve]

Can I change some settings in Optifine to make Minecraft render even those blocks that are covered by other blocks on all sides? Can I add geometry to an object without changing its original geometry? For example, draw a circle of lines around the player.

[Ari-RERA-43]

• No, rendering every face of every block would tank performance on even the most powerful of computers
• That would probably be better done with a mod, or possibly a shader.

[rxznve]

or possibly a shader.

But I already wanted to write a shader, the problem is that I don't know how to do this (add geometry to an object without breaking the original geometry of the object)

[sp614x]

For some blocks it is possible to use custom block models (https://minecraft.fandom.com/wiki/Tutorials/Models#Block_models). The check if block sides are to be rendered depends on the block type and a custom model can't help for solid blocks. Adding other geometry can be added with mods (easier) or shaders (complex).

[Lolothepro]

*https://minecraft.wiki/w/Tutorials/Models#Block_models