Having a few variants would easily work. Subtle control over the parameter really isn’t that necessary. Regarding my first response in the thread, is the addition of a bunch of extra modes going to cause objection or problems? Is this something that is going to be either optional or user-configurable? I haven’t had a chance to install 4.2, and I really don’t remember how Krita was configured.
That, and I hate to say this, but I hope you don’t think MIMT/IMBLEND are part of Matlab. I’m pretty sure if you referred to them as Matlab modes, you’d probably confuse the Matlab users most of all – since they’d be wondering when Matlab could do that. The FEX is all user-contributed files. I’m not associated with Mathworks or anything.
On the topic of sources, I have a question. I’ve found two different formulae for the ‘softlight’ variant attributed to EffectBank in the following sources, but I’ve not found anything more definitive. The website no longer exists.
This looks ideal
This is almost identical, but faster.
I was wondering if you’d seen any other sources regarding this mode.