denoise_atrous_rgba16f

One à-trous wavelet pass: a 5x5 gather whose taps are spread by step, weighted by how much the neighbour's normal and world position agree with the centre's. Running it with a doubling step each iteration widens the filter without widening the tap count.

Writes rgba16f; the pair of these covers the formats a filter is built for.

Bindings

name	kind	what it is
dn_src	texture2d	the noisy signal this pass reads
scene_depth	texture_depth	depth, for the world-position weight
scene_normal	texture2d	normals, for the orientation weight
frame_cam	buffer (read, vec4)	the camera, for reconstructing world position
dn_settings	buffer (read, vec4)	(step, normalSharpness, worldSigma, _) — what makes this iteration different from the last
dn_dst	storage2d (rgba16f)	the filtered result