Hi Patrice, On Sat, Mar 1, 2008 at 12:39 PM, Patrice Poly <[EMAIL PROTECTED]> wrote: > Hello > > I have searched a lot about this, and couldn't find anything apart a few > lines > in an old summer of code page, and in this old webpage : > http://www.re.org/tom/computer/gimp/index.html#preview > unfortunately this patch only applies to 2.3 > > this is why I allow myself to post here as a feature wish, even though I am > absolutely not a coder. > > I am using GIMP every single day for my 3D texturing work, and i have to > blend > together parts of photographies in an interactive way. > Parts need to be lined accurately so that you don't create blur in the > blending areas. > ( someone told me Hugin does it perfectly, but at a first glance, it seems to > involve complex settings and a lot of click work before it computes a > solution, when you just need to move things on the fly and see how it goes . > Hugin seems to be more suitable for assembling large images together than a > lot of little parts ) > > As GIMP is now, you need to move/scale/rotate/shear/perspective a selection > or > a layer, apply transformation, check if it lines good, undo, transform again, > check, etc, because the preview always turn to totally opaque , whatever the > layer opacity is. > > Having a little slider to set the preview mode/transparency would be a real > enhancement for this kind of workflow. > Another clean solution would be that the preview simply follows the active > layer mode/opacity .
In order to have a genuinely clean solution, I believe that GEGL needs to be integrated for layer compositing. Because the main issue here is that, when you overlay an preview of N opacity over a layer of N opacity, the appearance is that of > N opacity -- ie. such a preview is still not accurate. It's the same effect > that occurs when you draw a dab of paint at 50% opacity and then draw another > over the top -- the result is more than 50% opaque. What needs to happen is, the preview is composited onto the layer with 100% opacity, before that layer is composited onto the one below. This is rather tricky and without a graph-based image display, it is difficult to do in a non-kludgey way. > > I have read about Iwarp as a tool, that combined with a transparent transform > preview would turn GIMP into a fantastic texturing tool. > > > I have no clue how difficult it can be to code this, but I hope the > developers > of GIMP can find an interest in this. > > > With all my thanks for all the work done, > > regards > > patrice poly > _______________________________________________ > Gimp-developer mailing list > Gimp-developer@lists.XCF.Berkeley.EDU > https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer > _______________________________________________ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
