Sorry wheel gator...have been a bit busy but here it is! Hope the images and hyperlinks work, first time I've used them lol.
Firstly, start Photoshop and choose the foreground and background colours you want to use. Then select File...New and choose the size of texture you want to create. I use a 300 dpi image 512x512.
You should then see the following type of image (although may differ depending on colour usage lol):
Then choose Filter...Render...Clouds - this mixes the foreground and background colours together, and should give you something like this:
As this image looks too clean we need to add a bit of noise. So choose Filter...Noise...Add Noise and set the noise amount to around 4 or 5%, choose Gaussian distribution and bung a tick in the Monochromatic checkbox as shown in the next screenshot:
Next we want to add a bit of texture to the erm...texture lol.
Choose Filter...Texture...Texturizer and you'll see a box pop up like the one below. Ensure that the Sandstone texture is selected and play around with the settings of Scaling and Relief until you get the desired effect like this for example:
It looks okay...but is it seamless..?
To make sure the texture is seamless choose Filter...Other...Offset and you'll see this:
Select the horizontal and vertical values to half that of the size of your texture, make sure that Wraparound is selected and when you press OK your texture will be seamless.
For simple textures you'll be able to stop there...but for more detailed textures when you Offset the thing you may see horizontal and vertical lines in the center of the image.
To get rid of these simply choose the Clone Stamp Tool from the Tool bar (shortcut key is 'S'), it looks like this:
Select a suitable sized brush for the clone stamp and position your brush over an unblemished part of the texture and holding down the Alt key click the left mouse button.
This 'clones' that part of the texture. You can now go over your blemished parts of the texture and by clicking the mouse button 'fix' the dodgy lined parts.
When finished, choose Filter...Other...Offset and repeat the offset to ensure that the texture remains seamless.
And there you have it...a seamless stone texture done in a matter of minutes. Save it as a tga or dds file and Bob's your uncle
Hope that was helpful...during the next few days I'll include a few more including brickwork and wood textures
Duncan Edwards is the one person who, even today, I really felt inferior to. I've never known anybody so gifted and strong and powerful with the presence that he had - Sir Bobby Charlton