Const
Below this material alpha a surface is treated as glass-like and stops casting. Solid materials are 1.0; IFC glass / spaces / openings render well under it, while a lightly tinted-but-solid material (>= 0.9) still casts.
Below this material alpha a surface is treated as glass-like and stops casting. Solid materials are 1.0; IFC glass / spaces / openings render well under it, while a lightly tinted-but-solid material (>= 0.9) still casts.