Just wanted to check in on this thread. Still haven't gotten much of anywhere removing the stair-like artifacts without forcing the mip level to 0 (which we know is wrong). I tried using a trilinear sampler instead of the point sampler, but as I expected all that did was make the stair artifacts into slopes, but they still noticeably exists.
@jgrenier Have you had any time to port your code to HLSL and if so have you had any luck with it or experienced artifacts similar to what I'm seeing?
@Bruzer100 Could you tell us about the samplers you used during the different steps of building out your hi-z, convolution, and integration buffers? I'm using a point sampler for everything but the cone-tracing step (which in my code is currently disabled), and am wondering if perhaps I'm using an incorrect addressing mode or border mode (I currently use clamped borders).