Random Density Map GIMP Script

[jfrazierjr]

This is a great idea. I noticed though, that you have trees in various colors. How do you get this to happen?

When I first tried to use this, I was using transparent brushes, which I have found doesn't work if the density is greater than the very sparse. I ended up layering color behind one, merging down, and making a brush from the clipboard, but the trees all look identical that way. In your example there is at least color variance. Is this a difference in how I am implementing the script, or did you recolor them afterwards?

My guess is he used an animated brush in the first place...ie a .gih brush with multiple brush images, similar to .gif

[RobA]

My guess is he used an animated brush in the first place...ie a .gih brush with multiple brush images, similar to .gif

Ding! Ding!

That is correct. I was using a Gimp Image Hose made of a number of tree variations. All my gimp tree brushes are coloured image hoses, so they can be transparent with solid backgrounds. Even the B&W outline ones I make are full colour, with the outline (black) and the tree fill (white) so they will overlap without showing though.

-Rob A>

[Seraphine_Harmonium]

That is correct. I was using a Gimp Image Hose made of a number of tree variations. All my gimp tree brushes are coloured image hoses, so they can be transparent with solid backgrounds. Even the B&W outline ones I make are full colour, with the outline (black) and the tree fill (white) so they will overlap without showing though.

For those of us less savvy, how does one manage to make and set up one of these Gimp Image Hoses?

[Gartog, the Gullible]

...

All my gimp tree brushes are coloured image hoses, so they can be transparent with solid backgrounds[my emphasis]. Even the B&W outline ones I make are full colour[my emp.], with the outline (black) and the tree fill (white) so they will overlap without showing through[my emp.].

-Rob A>

Could someone please be elucidate?

In particular (where to start?),
* well, when is a brush wanted to be transparent(?) with solid backgrounds? (Forgive me, I don't even know if this means the brush has a solid background or that it is transparent when used on solid backgrounds)
* and how making them in color [defining the the GIMP .xcf project file using a colour palette?] effects that behavior, as compared to using black-and-white
* and regarding the "B&W outline ones," does this refer to a white tree on a solid black background (defined in a color project) or a white-tree-with-a-(narrow)-black outline on a transparent background

I apologize for my denseness, but thank you for your forthcomingness.

Gart

[Gidde]

This is the tutorial I follow whenever I find a need to do it (I don't do it often enough to have it memorized).

http://www.gimp.org/tutorials/Custom_Brushes/

[Seraphine_Harmonium]

Thanks Gidde!

[Korash]

I believe RobA gave the answer in the first post under the second thumbnail:

Create a new layer (it must be the same size) to draw on with the current brush.