Donate A Brush Stroke - or Get Unlimited Human Stroked Abstracts

trandoductin · **Posted:** Wed Jul 08, 2026 5:49 pm **(#1)**

and generate unlimited abstract.
The idea is simple.
You can donate one single brush stroke at a time. It gets saved to database.
Then the generate surprise art just takes random strokes from the pool and paints them randomly.

https://purkara.com/donate-a-brush-stroke/generate.php

trandoductin · **Posted:** Wed Jul 08, 2026 10:43 pm **(#2)**

I spent a little too much time on this today.

There's option to painted donated strokes with random colors or one color.

Added option to fade stroke from solid color to a set percentage of transparency.

And then I was able to generate the below pattern which I am using on a mock-up shirt shown below:

Rod · **Joined:** May 16, 2010 **Posts:** 16101

Pretty cool! I saw this idea once for a Johny Cash tribute on youtube. Instead of paint strokes you donated a picture and the whole thing got animated.
Pretty neat idea.

https://www.youtube.com/watch?v=PBmky9Tx2UM

trandoductin · **Posted:** Thu Jul 09, 2026 6:51 am **(#4)**

Johny Cash is the man!

trandoductin · **Posted:** Thu Jul 09, 2026 7:33 am **(#5)**

Ok the generator has cool options now to select up to 8 colors to be used for strokes.
Here i used the first 5 default colors black,white and primary red,yellow,blue.

trandoductin · **Posted:** Thu Jul 09, 2026 7:39 am **(#6)**

I really enjoy this new option with the generator now.

trandoductin · **Posted:** Thu Jul 09, 2026 6:23 pm **(#7)**

Later version has option to taper off strokes to a percentage of original brush width.
And painting tone difference so it looks like some sort of painted stroke.

trandoductin · **Posted:** Thu Jul 09, 2026 6:24 pm **(#8)**

Someone suggested I try to use Product Hunt to launch the webapp so I did it'll launch tonight at midnight

trandoductin · **Posted:** Fri Jul 10, 2026 7:45 am **(#9)**

Added stroke credits section on the generate art page so that it lists for example
tim - 1 stroke
anonymous - 99 strokes
so people can see which or whose strokes were used in current piece.

trandoductin · **Posted:** Fri Jul 10, 2026 8:46 pm **(#10)**

Added option to choose wet surface so new strokes tries to smudge paint that's already there like it's wet

trandoductin · **Posted:** Sat Jul 11, 2026 8:58 am **(#11)**

We have 255 brush strokes (doodles) now.
A feature has been added - hybrid strokes which 50% morph (halfway morph) of pairs of donated strokes.
So that's over 32 thousand hybrid strokes.

So if someone donates a brush stroke now it's not just one stroke it's 1 original + 255 hybrid ones.

Also show stroke credits

trandoductin · **Posted:** Sat Jul 11, 2026 6:08 pm **(#12)**

This new feature is like the coolest I ever thought of I think
https://purkara.com/donate-a-brush-stroke/replay-4.php