vlt_rubble

# vlt_stone The crypt's masonry, computed rather than textured. Ashlar coursing in running bond, grime, large slow stains that cross many courses, moss gathering in the joints, damp streaks and a tide line where the flood has stood for two hundred years — all of it from world position, so one shader dresses the well's curved wall, a flat flagstone floor, a dressed pier and a block of fallen masonry with no UVs authored anywhere. `cylindrical` unwraps a surface around the world Y axis so coursing runs continuously around an enclosure with no triplanar seam; `wet_line` and `wet_depth` set where the stone stops being wet, and everything below goes dark and mirror-smooth. `dark_top` takes the albedo down with height so a deep shaft loses its walls to the dark instead of to flat grey. Consumed by `vlt_wall`, `vlt_floor`, `vlt_pier` and `vlt_rubble`.