Some more test imagesDecember 15, 2013 - 7:58 pm by Joss Whittle C/C++ Graphics PhD University
Thought it was about time to test some caustics on the renderer. Lately I’ve been both fascinated and frustrated by the strange forms and shapes that occur when light refracts and reflects off of lit surfaces. A great example of this is a metallic ring laying on a diffuse surface. Light bouncing onto the inside edge of the ring will be focused downwards onto the floor plane in a curved m shape causing a bright spot.
I’ve also been playing around with scenes that employ more indirect lighting. By this I mean scenes where the light source(s) are mostly if not entirely occluded from direct view by the camera. To this effect I set a standard cornell box scene with a yellow cube and a white oblong inspired by Cohen & Greenberg,and placed an occluded light sphere in the back-bottom corner of the room. I then toggled which of the two hemicubes were made of glass to see how the light would refract through them.