UNDO eraser?

i was thinking (dreaming) a way to link the brand new -thank you very much- multiple undo (apple Z) function to a brush, not to produce an eraser but to create an undoer, that would (selectively) rebuild the canvas, i call it the EMIT-BRUSH (time-backwards-brush) it would work globally, with paint synthesizer, image operation, msg, etc., etc., (in any operation mode) all over SA!! If there is such a thing already on SA4 (forgiveness and mercy) please direct me to it.

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  • By selectively do you mean to rebuild the canvas only in the area covered by the brush nib, or selected area if using a region brush?
  • What a wacky concept, thisyour EMIT-BRUSH. Sounds more like a comic strip characters 'super-tool', maybe athing used 'time-backwards' to undo undesirable outcomes (in order to give randomness another chance maybe). In what way(s) are you dreamin g it could be built? The EMIT-BRUSH, not the comic strip? I'm still with v3.5, but I'm innerested in 4 abit, BUT I'm easily confounded so I'm waiting for the final v release along with the instructionals & tutorials (John D. alluded to it as some form of "handholding", I see it as simply avoiding SA's learning curve mental-anguish gnashing). You're not talking History palette here I suppose, so I'm trying to concieve 'Undo' anew and flesh what's meant by "selectively rebuild" & "global". Will working time-backwards yield something radically different from working time-fowards? Does SAv4 have brush (or PAS) abilities to route into other actions & operations of the program? What might we suppose Unprediction to be? OK, now I'm rambling....

    to play on something said by Liveart..."Oh, great, just what we need, another set of infinite reverse-possibilities to explore".......
  • You can use the current undo buffer as a fill from source, so you've already been able to do that since the very beginning of studio artist. however, you don't currently have access to any of the previous undo buffers on the multiple undo stack. It would be kind of a potential nightmare as far as coding it so i'd need to understand more about how you would use something like this.

    Couldn't you use layers to store previous images and then use the bus option in the paint synthesizer to clone paint from those layers to your current layer to get the same effect? That feature is available today.
    • yes john, i believe that's (the) one way to do this
      now you'll be disappointed because my idea is very simple...
      i was aiming for something less cumbersome (straight forward-to go backwards!- if you like)
      than capturing layers (each time!!) i do something to the canvas
      i envision this:
      AUTOMATICALLY the last version of the whole current image is kept in some kind of memory patch,
      (that refreshes itself each time something is done to the canvas) AND is ready to be accessed
      using (with most of the parameters that a brush has available in the synthesizer)
      a soft, hard, watery, dusty, or clone the (previous) canvas kind of brush.
      a constant "capture canvas to source image" memory thingy
      see? simple!

      the way i work?: (yes i know, nobody asked) i start to paint/filter/etc the canvas (and more often than not)
      too late i realize that i went way overboard with an effect (paint/operation/etc)
      BUT (what an odd thing!!) i like the look of some sections of the unwelcome resulting image,
      AND i would rather kept the previous (more pleasing) version on the rest of my canvas

      mixing the good accidents with the proven ones

      as now, i do erase the canvas and try again (and again , and..)
      until i get some approximation of what i think looks best

      all of this to speed up the process
      less energy invested on the how and most of the effort on the what
      • an alternative to this could be more than one source image,
        where, accessed by a simple click,
        image #2 would be the constant refreshed current canvas
        image #1 been the primary source
        ...and image #3 the lovely pinky flowers,
        ...and image #4 the graphic that i created in photoshop,
        ...and etc., etc., etc.
        • well now this you CAN do via the recent source images in v4, (nine images deep). I suppose if you wanted to add the (recent) canvas as a source which you refreshed- you could do a current view as new layer action on a regular basis (every few minutes or after significant change). I think John could easily add a hot key for that so it would be a keystroke vs a mouse click to save.
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