Feasibility of custom shading

[mikael-wants-to-visit-disneyland]

Is it possible to achieve a hatching effect? I want to be able to control the hatch line density and thickness based on the surface's normal, and if possible, whether there is a shadow on it. However, I cannot find out how to paint a dynamic texture on a plane, such that it is free from perspective.

[kpreid]

Effects like this hatching can be done with reference to screen-space coordinates by using an @builtin(position) input to the fragment shader. Use that as texture coordinates or procedurally compute your lines — either way it will keep the hatching “free from perspective” and with a scale referenced to the viewport rather than the vertices' world positions.

[mikael-wants-to-visit-disneyland]

Makes sense. Thank you.