Image reconstruction for sparse tracing? It’s a novel idea, wonder what the delta over motion is. Another thing to note though is that the test image is fairly low frequency in terms of spatial delta, lots of smooth lines and gradient like changes. The input also appears heavily biased towards edges, which will make accurate reconstruction easier. It’d be a better test if the input was actually randomly sampled from halton sequence/whatever. Maybe it wont matter that much for diffuse traces but it might get bad for specular. Still, excited to see what the results are!