I’m pretty new to Radiance and I stumbled on a problem I probably should have predicted, given more experience…
So I have a scene where the light source is behind a curved dielectric medium, and both are in front of a plastic wall. The source has a very narrow spatial extent, almost like a point source. Now what happens is that a ray will start tracing from the camera, hit the wall, but will never reach the light source. This makes sense since it’s not possible to do any direct calculation this way - there’s only a very specific direction in which the ray will actually reach the source.
This seems like something that probably was encountered by others and should have a solutions, so I’d be very grateful for any assistance here.