gmask smoothstep end -0.10 -> -0.30: ground only fully fills when ray Y is below -0.30 (about 17° below horizon). The horizon line sits higher in the frame, more sky visible above.
gmask smoothstep end -0.10 -> -0.30: ground only fully fills when ray Y is below -0.30 (about 17° below horizon). The horizon line sits higher in the frame, more sky visible above.