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RobA
10-24-2007, 04:21 PM
I'm trying to refine the technique used here (http://www.cartographersguild.com/showthread.php?p=8542#post8542). to make this style of map in GIMP.

Attached is what I have so far (without any colour adjustments). This allows pretty fine control over the location of the mountains, shorelines, and forest features.

I haven't applied any colour adjustment to the image at this point.

I particularly like the shore water effect I came up with using a displacement map twice in opposite directions.

-Rob A>

RPMiller
10-24-2007, 04:26 PM
Looking very nice!

ravells
10-24-2007, 06:31 PM
Beautiful!

RobA
10-24-2007, 11:11 PM
On a whim, I massaged and exported a height-field from this image, and exported just the colour washes with no shading, and combined them in using the Persistence of Vision raytracer (http://www.povray.org/).

I then rendered the image out using the forced perspective of 3D planimetric relief (plan oblique relief) with a 26 degree elevation back into a 800x800 image...

This leaves the land shaped the same, but notice how the mountains now have a profile view to them? It's quite a bit of extra work, but it does make for a nice map ;)

-Rob A>

RPMiller
10-25-2007, 12:09 AM
Oooo... Purtey! Very stylized, but it has a lot of character. I likey!

ravells
10-25-2007, 05:49 AM
Wow! how long did the process take, Rob? I really like that look and this might give me an answer for my Map on the WIP section. The style looks just right.

Faide
10-25-2007, 07:16 AM
How did you do those lovely mountains in GIMP?

Is it a pattern fill?

RobA
10-25-2007, 08:45 AM
Wow! how long did the process take, Rob? I really like that look and this might give me an answer for my Map on the WIP section. The style looks just right.

I'm assuming you are referring to the forced perspective mountains...
All you need are:
1) POVRay
2) A b/w heightfield
3) A colour texture overlay

And the following snip of POV code (rendered out as a 800x800 image):

global_settings { assumed_gamma 2.2 }
#include "colors.inc"

camera{location <0,4,-8>*25000 direction z*41700 look_at 0 up y right 2.24*x}

light_source{ <-1000,100,-1000>/2 White*1.5 }
light_source{<0000,1000,0> White*1.5}

height_field {
"hf_map.png" smooth
pigment {image_map {"hf_image.png"} rotate x*90 }
translate <-.5, 0, -.5>
scale <12, 0.6, 12>
no_shadow
}


Attached are the heightfield png (from my source GIMP image, the heightfield is almost a by-product of the technique I am working on) and the texture map - the map image with no shadings in the mountainous areas (again, this is one of the layers from the technique I am working on). I kept the water and grassland/forest shadings as I didn't include them in the heightfield.

-Rob A>

RobA
10-25-2007, 08:49 AM
How did you do those lovely mountains in GIMP?

Is it a pattern fill?

If you are referring the top view mountains, it is a combination of perlin noise, palette mapping, and bump mapping.

If you are referring to the forced perspective mountains, it wasn't done in GIMP, I used a ray tracer (see my previous post in the thread for details).

If I'm still not clear let me know :)

-Rob A>

ravells
10-25-2007, 10:16 AM
So just by sheer good luck, the perlin noise produced a result which translated perfectly into a height field that looked like mountains? (I'm assuming that the heightfield is just a greyscale image of the map?)

I'm thinking of using Bryce rather than POV ray to render the heightfield but the trick is getting the heightfield to start with. I'll try messing around with some of my noise filters and see what they come up with.

RobA
10-25-2007, 11:37 AM
So just by sheer good luck, the perlin noise produced a result which translated perfectly into a height field that looked like mountains? (I'm assuming that the heightfield is just a greyscale image of the map?)

Well... It wasn't just luck. There are actually two heightfields, one for the main land and one for the mountains. I scaled them and added them together to get one final height field for the render. I also played with the curves to get the rendered clouds to have the distribution I wanted....

I'll make a couple of examples in a bit....

-Rob A>

ravells
10-25-2007, 12:51 PM
U R teh 733t

RPMiller
10-25-2007, 01:07 PM
U R teh 733t
I'm going to have to throw a card on that post and hit you with the biggest infraction we got. Using 733t is strictly prohibited! :x It sets a bad example for the kids as well as a precedents for me handing out a stream of infractions. :twisted:

;)

ravells
10-25-2007, 02:23 PM
Would you like me to send you a lolcat instead? :)

RobA
10-25-2007, 02:59 PM
U R teh 733t

Th4nks m4n. H34d 0v3r h3r3 (http://www.cartographersguild.com/showthread.php?t=1048)t0 s33 4 tut0r14l 0n m4k1ng th3s3 h31ghtf13lds.

(translation -
Thanks man. Head over here (http://www.cartographersguild.com/showthread.php?t=1048)to see a tutorial on making these heightfields.)

-Rob A>

RPMiller
10-25-2007, 03:40 PM
Would you like me to send you a lolcat instead? :)


Th4nks m4n. H34d 0v3r h3r3 (http://www.cartographersguild.com/showthread.php?t=1048)t0 s33 4 tut0r14l 0n m4k1ng th3s3 h31ghtf13lds.
You just wait till your father gets home, you two! :x

RPMiller
10-25-2007, 03:41 PM
(translation -
Thanks man. Head over here (http://www.cartographersguild.com/showthread.php?t=1048)to see a tutorial on making these heightfields.)

-Rob A>
Very nice! I'm going to see what changes to make for PS and give that a shot.

pyrandon
10-25-2007, 05:07 PM
I'd love to see that PS app!!

Joshua_101
11-02-2007, 06:58 PM
I'd love to see that PS app!!

Me too! The top down mountains (before the forced perspective) are exactly what I'm looking to emulate right now. Trying on my own to get Clouds or Inverted Clouds to be less random... can't seem to figure out how to get the white areas (for the high mountain peaks) exactly where I want them.