Mike Jarvis

What I would like from this issue is some kind of heuristic that could tell us for a given profile at what flux it will be faster to switch from...

Great. Just a couple thoughts to possibly guide your investigations. The FFT timing will probably (at least most of the time) be proportional to the size of the K-space image....

Cross reference Issue #731. Making the COSMOSNoise stuff more generic might be worth doing at the same time.

I did item 1 of this issue as part of #755, since it actually made it easier to get test coverage of some bits when there is no normal COSMOS...

Done via #755 and #1174

They definitely look suitably realistic to me to be worthwhile from the standpoint of WL testing. Do they have the right properties as a function of redshift the way the...

Personally, I think it makes more sense to have `withExtinction` be a method of `ChromaticObject` rather than `SED`. Or both I guess, since applying to an SED also makes sense....

> I would think it would be the case that the result should be the same regardless of whether you do (bulge+disk)_extinction or bulge_extinction + disk*extinction. What am I missing?...

Why not just use the function version then? I don't see the need for the `withExtinction` method if we have the `extinction` function. And, as you say, there are other...

I think this could be valid either way: 1. Let SEDs model _either_ flux(lambda) or flux_ratio(lambda). Then extinction would also be an "SED" at least as far as the code...