Re: [Linuxwacom-discuss] Pressure Curve

[Raeth <rae...@gm...>]

I tried both the most softest ("0 75 25 100") and the most firmest
("75 0 100 25") from Voluspa's wacomcpl table, and found they made
only a slight difference.

This could indicate GIMP is not extrapolating the steps correctly,
though I  do have "incremental" unchecked. Should I have the
PressureCurve option in every device section relating to the tablet
(there are four, due to it being a Graphire 4), or just the stylus
device?

Does anyone else have a problem with the pressure-distribution on
their GIMP strokes?

Thanks,
Raeth

On 10/7/06, Martin Renold <mar...@gm...> wrote:
> On Sat, Oct 07, 2006 at 09:33:30PM +0200, Voluspa wrote:
> > On Sat, 7 Oct 2006 20:00:41 +0100 Raeth wrote:
> > > When using The GIMP I find the default pressure curve setting
> > > ("0,0,100,100") produces too soft a curve, in that it hits full
> > > pressure too easily.
>
> This might also be a GIMP "problem", which you ideally should not have to
> solve with a global pressure curve.
>
> I just did some math. If the application draws the brushdabs
> incrementally in a certain way, then the pressure curve will feel too
> soft, it gets dark too fast, as you describe. How much too fast will
> depend on the spacing of the brush.
>
> If anyone is interested:
> http://people.ee.ethz.ch/~mrenold/mypaint/brushdab_saturation.png
>
> However it seems that GIMP usually works around this problem by drawing
> each stroke on a seperate layer (the "incremental" setting of the
> paintbrush turned off - drawing over your current stroke with same
> pressure will not make it darker).
>
> So if that's your problem, then the paintbrush tool (with "incremental"
> box unchecked) should give you the expected pressure response, but not
> the airbrush tool, I think.
>
> bye,
> Martin