rgba color match live filter

[kirk23]

Would be nice to have  a live filter that would match  every  rgb or A(as an option) value of pixels   to what's  beneath .   So getting sort of automatic color and tone  adjustment  for a new layer to  be mixing seamlessly with background.

it's like when you do frequency separation   and get hi and low frequiency layers   the low freq layer is actually  blurred (with a slider) background. 

Might be several other approaches too  but all based on blur  and frequency separation.    Perfectly doable   but require so tedious routine   and complicates the stack so much   I would love  just a live filter doing so.

 

Or just let us do our  own live filters by letting  procedural filter see beneath.   Please 🙏