Beware the temptation of the crunch culture 😄

I added a quick traditional multi-resolution separated blur implementation for bloom, because why not have that too for reference. I of course added the lens flare gather to one of the bloom mips and ended up finding a cool, more intricate flare pattern in the process 😄

Good thing my vintage Sponza has a glint problem as I can use it for Bloom dev 😄 Perf is still bad, but at least it's consistently bad in a way only FFT convolution can get you.

I couldn't resist and added in the bloom composite pass before looking into that convolution color shift. The kernel is also constructed from proper gaussians for that smudged lens look.

I raise with

Much of the error was from unrelated bugs: convolution is of course a multiplication of complex numbers and apparently the real input kernel should be centered on a corner, wrapping the image. Looks more correct now and the incorrect tint is the two-for-one component entanglement, I wager.

Yup. Back to reading.

It's cool how the periodic nature of the DFT shows up in the noise as these stretching and mirroring artifacts.