Stencil Layers

Properties to expose:

L1_StencilMesh.twosided (Handled

L1_StencilMesh.reverse

Prepass:

Draw L0_Geo

Draw L1_StencilMesh

depth cmp <= L1_StencilMesh.bNotInDbgForceAlways ? near : always

depth write = L1_StencilMesh.bIsAnotherWorldPorthole ? infinity : keep

stencil_write = L1_StencilRef

stencil_cmp >= L0_StencilRef

Draw L1_Geo:

depth cmp <= near

depth_write = fragment_depth

stencil cmp == StencilRef_L1

stencil_write = Keep

Draw L2_StencilMesh

depth cmp <= L2_StencilMesh.bNotInDbgForceAlways ? near : always

depth_write = L2_StencilMesh.bIsAnotherWorldPorthole ? infinity : keep

stencil_write = L2_StencilRef

stencil_cmp =>

​ if L2_StencilMesh.bIsScopedToPreviousLayer

​ ? GreaterOrEq to StencilRef_L2

​ : Always

Draw L2_Geo:

depth cmp <= near

depth_write = fragment_depth

stencil cmp == StencilRef_L2

stencil_write = Keep

FINAL LAYER:

depth cmp <= near

Avatar/Asteroids

Question:

What happens when you're inside?

Avatar hands?

Objects that cross the boundary of portal

Basepass:

Draw everything with depth_cmp = equal

Translucents:

Draw everything in its already sorted back-to-front order, Because this pass hasn't primed the depth we can't use depth_cmd = equal to scope. We need to just let these draw and rely on artist constraints to stop particles/transparents from crossing the portal boundaries unless intended that way (smoke pouring out a hell portal for example).