First, a warning: Loaded with the stuff eyes love gnoshing, Clash of the Titans should be seen in two dimensions, not three. Filmed top to bottom for a 2D release, Clash of the Titans composition, lighting, effects and edits were created for the unaided eye. As a result, Clash of the Titans retrofitted 3D presentation is a dim, vision punishing mess of double imaging and off-kilter depth; slipshod artifacts that disrupt viewing to the point of souring it. Technological grumbling …