David Gowers wrote: > On 8/21/07, Konstantin Svist <[EMAIL PROTECTED]> wrote: > >> Hi, >> >> I wanted to ask why the lines drawn with a Wacom tablet look so >> different when drawn in gimp vs. when they're drawn in Photoshop or >> OpenCanvas. >> Attached is an example of lines drawn in Photoshop CS2, CS3, OpenCanvas >> (sorry, can't remember the version #) and Gimp (2.2.15, I think) >> The line drawin in Gimp does not look very smooth - there are bumps n >> the line and it looks segmented. >> >> Why is this happening and is there any way to fix this behavior? Is this >> intrinsic to Gimp or does it come from the linux wacom driver? >> Maybe Photoshop/oC have some smoothing algorithms that they apply to raw >> stroke data..? >> >> > a) the pressure curve being used with GIMP is definitely different > from the one used by the other software. This is related to the > LinuxWacom driver (look up the 'PressCurve' option, to adjust the > curve.) > b) yes, oC certainly does have smoothing algorithyms.. and probably > Photoshop too. > c) 'p1' seems to be using a different brush than the other 3. > d) The 'jumps' in brush size are due to limitations that GIMP places > upon brush scaling. There is probably some way to adapt this so it > works better for small scale brushes. > > >> Has anyone encountered something similar before? >> > > The ink tool in GIMP is the only tool that currently uses smoothing. > As you can see, it produces results comparable to Photoshop and oC: > > http://img.photobucket.com/albums/v449/neota/alphazero/ink.png > > The smoothing code for the ink tool can probably be adapted for use > with normal brush-based paint tools - if you want this, I urge you to > investigate. >
Thanks everyone for advice! I'll definitely try playing with the pressure curves. And yes, 'p1' was apparently a modified brush (the original artist confirmed it :). But that aside, p2 and o1 look a lot better than g1... I've heard somewhere that gimp was made for photo editing, not drawing/sketching.. so I guess it's not very likely this will change? Are there any programs in Linux that were actually made for drawing/sketching? Thanks! P.S. just tried the ink tool - it has a fairly annoying "angle" setting which makes the strokes change width based on the angle (angle 0 means horizontal strokes are thin, while vertical strokes are thick). I don't see the same in your example, though - what setting did you change to get that? _______________________________________________ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
