Files named with .rar or .zip from unofficial sources can sometimes carry risks. If you did not download this from an official storefront: OCTOPTICOM 3D on Steam

Blocks all light except for its specific primary color (Red, Green, or Blue).

Allows beams to pass through opposing sides while blocking the other two; used for optimization. Simply stops any beam that hits it from either side. Safety & Verification

: Finding the most compact or efficient way to solve a level.