What might adobe call it? Filter layers? Layer Filters? I can imagine that up-to-date computers can do the maths concerning re-calculating the pixels everytime some Filter Layer, or Layer Filters, parameter is changes. Like the position of a light. In After Effects one can blur interactively. And hours, days, weeks later, decide on a bit less. That is, I think, what I would want. Non-Destructible Non-Linear Adjustable Filter Layers! How's that for a name in the 'NEW IN PS8'advertisements!