How is air rendered in minetest with glsl?

[badentry]

I wonder how empty nodes like air or similar blocks like glass is rendered in minetest, in the glsl src code

[srifqi]

Air is simply no node (nothing). I don't understand much about other nodes.

[TenPlus1]

Air blocks aren't rendered in minetest engine from what I gather, it's an empty space that doesn't need to be drawn, glasslike nodes on the other hand would need to be processed as transparent overlay onto the background behind it.

[Andrey01]

Air doesn't have the geometry at all and therefore doesn't get rendered. This is well seen in this part of the engine code (when the function has found out from its ContentFeatures its drawtype == NDT_AIRLIKE, it just does a return: https://github.com/minetest/minetest/bl ... .cpp#L1742

[Hybrid Dog]

Air is simply no node (nothing). I don't understand much about other nodes.

No, "air" and "ignore" are two different nodes.