Hello there,
Just a word about a new filter I've just included in the today's prerelease of G'MIC (numbered 2.0.2_pre), located at Artistic / Quadtree variations.
I'm pretty sure you, filters guys, will know what to do with it

Preliminary note: This filter is available only if you have installed the very latest pre-release version (2.0.2_pre) of the G'MIC plug-in for GIMP. And even with that installed, you'll have probably to press the Update filter button to make the filter appear. That's very recent work

So, what does the filter do ?
Mainly, it decomposes an image using a quadtree technique (see https://en.wikipedia.org/wiki/Quadtree), then uses the quadtree information to resynthetize an image with different types of possible rendering. For instance, if you start with this image:



A quadtree-based decomposition will basically looks like this



which means the filter tries to recognize which parts of the images are the most important to consider (i.e. contains the more information, like contours, textures, etc.).
If you re-use these geometric information to draw brush strokes, you can end up with some nice painting effects :



is transformed as



and



is transformed as



I'd be curious by what you can get with this filter. Do not hesitate to test and tell me !
Here is a final screenshot of the filter in action :

Very cool filter David! =)
Thanks for the update.

My play with the new filter.

Another nice example, where filters 'Quadtree variations' and 'Illustration look' have been used.



What do you think ?

I like this effect very much. =)

Thank you, David.
after 'Quadtree variations', Iains 'Pyramid processing'.

Definitely a cool preset, David. Added a few other things for this result.

Quadtree effect on an Eagle in flight. Blending mode (Darken Only) applied over original.

Sushi anybody???

QT followed by Skeleton, then healed the voids to create template target for blend shape average.

Increased homogeneity and added some relief using local orientation. No grout (transparent) this time.

Two more variants. Created path from quadtree output and then smoothed path for this one (added grout):



I then ran voronoi path of the previous version for this one (no grout):

ref: https://openclipart.org/detail/106135/b ... -lodahl-01

This time I blended original Quadtree output with the voronoi output result to create the tile mask. Added some texturing afterwards.

https://www.flickr.com/photos/34520999@ ... 1/sizes/o/

I feel your happiness, in playing with this new toy, Lyle....

Appreciate the words, Diego.

I love it!! I had to experiment with it myself!