4 ms·
Transparent object like glass are also a problem for path tracing. Bidirectional path tracing can improve this but it's hard to predict which rays from a light
by pasta 8y ago
Transparent object like glass are also a problem for path tracing. Bidirectional path tracing can improve this but it's hard to predict which rays from a light source will be visible to the camera.
It's amazing we can now have photorealistic images in seconds.
But I think it will take some more years before studios can render the latest Avatar in realtime.
- 0-_-0 8y agoAn example of a hard to render situation (not just for path tracing) is visualizing caustics on the other side of glass, since you can't connect paths directly to light sources or the camera. (S[SD]*S type paths in path tracing notation). If it begins or ends with a diffuse reflection then it's _relatively_ simple to form a path by starting at the other end.