Gustavo Deveze about Wet Techniques with Gimp

Gustavo Deveze use Gimp for his works. The style and technique is very beautiful. I and Gustavo are talking about brushes on Gimp to emulate the traditional painting techniques. This article is a re-editing of our thread.

The Bad Wolf, by Gustavo Deveze made on Gimp.

 

About Gimp and their painting instances

On Gimp easier to emulate dry techniques with their brushes. I've studied this topic very much... and I've discovered some tips to emulate better the wet with many brushes. I don't have time yet to write my thread about this with Zabadal... but you can find some insights on:

http://americogobbo.blogspot.com/2013/01/blending-modes-and-insights-for.html

The technique is simple and intuitive:

• choose a brush, preferentially a .gih, with a good sharpest and dimension (between 64 and 128 px). 
• the brush must have layers with different stains (kind and quality). 
• while you paint do great variations on the dimension... brushes when you scale with great factors it causes many effects interesting. 
• when you try to do a watercolour you need to control the opacity between 15 to 35%... this technique has mainly this opacity range between the overlaps of the stains.
  

You can watch an old video about my wet series made by my friend Mozart Couto:

 

http://www.youtube.com/watch?v=drA-uDor6Bk

 

It is very illustrative of the qualities of the original series.

I've written something about:

http://forksanddrills.blogspot.com/2013/03/o-pincel-digital-ideal-e-afins.html

 

L'ubomir Zabadal, in our mega thread about wet instances, wrote me, after some dynamics that I've sent him:

 

Tool Options:

Opacity 30-35 %, with a few brushes even 45% mode normal or multiply.

Dynamics:

Opacity/Pressure

Size/Pressure

Hardness/Pressure

My suggestion to control the Wet instances on Paint Dynamics matrix is to have 'on':

Tool Options:

Opacity 15~35 %, Mode Darken Only.

Dynamics:

Opacity > Pressure, Velocity

Size > Pressure, Velocity

Hardness > Pressure, Random (all constant curve kind)

Force > Pressure (idem)

Opacity and Blending Filter on Brush - Wet Techniques 

The opacity and the blending filter applied on a brush is very important.

Some brushes... very soft have a high opacity others more sharped a low opacity. I don't have a formula for this ... but is secure to keep on low opacity values the overlaps of brushes. Another thing important is the blending filter... for me is better to use the "Darken Only", the kind blending equals the wet techniques [see: Subtractive primaries].

 

Paint Dynamics matrix for wet techniques.

Controlling of the Blend Mode and
Opacity for Wet Techniques. 

Some ideas about the Hardness and ForceI think it useful to have a Hardness sharpest ... the Hardness curve works so: the middle superior of the curve is the sharpness zone... and the middle zone is considered Normal and below that is the softness area. In some machines, this parameter causes a bit of delay. But if this curve is constant or almost is easier to processor calculate it.

Force settings is another parameter to increase the effect of the many parameters ... in this sample is on pressure and random. I've noted that these two parameters can be more useful to increase or decrease the sharpness or softness of the brush stain.

Controlling of the Blend Mode and
 Opacity for Wet Techniques.

Modelling the Force parameter to increase the output effects on
Hardness, Opacity and Size in function of Pressure.

I've made a small video with the main pieces of all advice exposed in this article. I've tried Deveze's brush, mainly in the chiaroscuro and modelling the volumes with wet colours:

Understanding how to build paint dynamics on Gimp for Wet Techniques. [with a Deveze Brush]