I have a plate with several pinholes (8+9=17), underneath which there is a light detector (rectangular region in the cross-sectional view).
The point light is defined at the red point directly above the holes. When the only light source is the point light, I would like to see the image of the light source on the detector after the light travels through the holes. It should look similar to this: but the cross-sectional picture of the detector only appears to be uniform in light intensity. Is there a way to more accurately represent the scenario?