Tiling Tarmac

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Submitted by Julius on Thu, 07/29/2010 - 15:42

Preview:
Tiling Tarmac

Description:

A quicke tilable (1024x1024) version of the tarmac texture posted here:

http://opengameart.org/content/weathered-tarmac

Also quickly made a darker version; png because that is lossless.

Created with the GIMP resynthesizer plugin:

http://www.logarithmic.net/pfh/resynthesizer

And this instructions:

Open source image in Gimp.

Select a area in the image to be used for the texture. It must be fairly uniform in the tonal range and have sides that is power of two (32x32, 64x64, 128x128, 128x64, etc.) to be video card friendly.

Copy and paste the area into a new image.

Apply the high-pass filter, called Resynthesize in Gimp (Filters/map/resynthesize)

Offset the image by choosing 'Image > Transforms > Offset' or press Ctrl+Shift+O. Offset by x/2 and y/2. to check if it tiles correctly

Use clone, smudge and other tools to erase the visible seam. (was not necessary in this case)

Offset again to get the image back to normal.

Possible run the high-pass filter again to remove any low-frequency features introduced by you. (was not necessary in this case)

Artist:
Julius (OpenGameArt.org user)

License(s):
GNU GPL 2.0
GNU GPL 3.0
CC-BY-SA 3.0

Favorites: 1

Download:

tarmac_light.png

tarmac_dark.png

3 comments

Thu, 07/29/2010 - 16:00

mercury_zero

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Joined: 07/09/2010

Points: 25

Re: Tiling Tarmac

What do you mean by high-pass and low-frequency?

Thu, 07/29/2010 - 16:45

Julius

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Joined: 10/03/2009

Points: 158

Re: Tiling Tarmac

"High pass" is a technical term for what the resynthesizer plugin does, don't ask me about details ;)

"low frequency" patterns are for example a single bigger dark area in the texture that when the texture is tiled is really visible as repeating with a low frequency and thus destroys the illusion of an "endless" texture.

Thu, 07/29/2010 - 20:38

lattice

Offline

Joined: 12/12/2009

Points: 36

Re: Tiling Tarmac

"High frequency" is being used here to refer to suden changes in the levels, or high contrast areas where one form ends, and another begins. A "High frequency pass" filters out everything but theses sharp changes, essentially leaving you with the outline of an image. In this context, it could be used either to sharpen the image, by using the outline to emphasise the contrast, or the opposite, to reduce the obviousness of a seam in the tiling image.

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