Add DepthNormal() mode to lit shaders, this seem the most straightforward way to do this, shaders with just Depth() usually have a shared shader with no-color no-material output, legacy shaders rebuild normals from depth, not rendered in depthnormals mode https://files.facepunch.com/sampavlovic/1b2711b1/hSVL6jr1Rx.png Remove old no-normals depth prepass, keeps things simple, effects that we use will need to rely on depthnormals, doesn't add too much cost Fix typo on gtao