[Award Winner] Tutorial on how to create seamless textures out of anything

[Redrobes]

Like I mentioned at the start you need to keep the overall tone uniform for it not to repeat. Using my internal program I can generate this image and tile it 3x3 like this which allows a better look. If you want me to run this for a texture you have then email me and ill do that for you, but if your careful then you wont need it.

[Redrobes]

One final note. You can do this with 3D objects too. I originally developed this photo technique from adapting it from a 3D object tutorial on the web somewhere. You can create a pavement by creating paved tiles as 3D objects then taking the right hand side paving stones of a patch and placing them on the left and vice versa and then also for the top and bottom then slice the 3D object in a square cutting the edge paving slabs into halves and then your 3D bit of paving can be tiled.

End of tutorial - any questions or comments ?

[Gamerprinter]

Good Tut, Redrobes - have some REP! I've got to give this technique a try.

[Robbie]

That tool you have...is that similar to high pass? I've used high pass on textures before to even the brightness, but it kills off the colors.

[Redrobes]

The program I use is a spatial filter which does Fourier analysis. If either of those things mean much then ill talk about it and share filters as it can be indispensable but otherwise its a hard technique to use.

I am using a high pass filter but I am keeping the average or DC component. The program allows you to set how much of the high pass to keep. I am only knocking out a little of the low pass - just enough to even out the brightness.

In theory if you use a high pass and a very very large blur - enough to average the whole image to a single shade and then add the two together then it should produce the same effect. Generally tho, most paint packages clip the high pass or center it around the mid grey mark so that when you add them it would not look right.

[RobA]

In theory if you use a high pass and a very very large blur - enough to average the whole image to a single shade and then add the two together then it should produce the same effect.

I had posted more detailed steps on the manual method previously here:
http://www.cartographersguild.com/sh...=5842#post5842

-Rob A>

[su_liam]

FFT and IFT. Two photoshop filters I can't get for mac. On my budget anyway. I've been interested in direct frequency synthesis for some time, but I can't seem to find the tools.

GeoTerSys is really starting to sound like an, "everything-plus-one-kitchen-sink," tool. Good luck building it, mate.

[Redrobes]

I had posted more detailed steps on the manual method previously here:
http://www.cartographersguild.com/sh...=5842#post5842

-Rob A>

Rob, I checked out this post as follows...

One way to get rid of the pattern artifacts (in the grass layer) is to apply a high pass filter effect (using the following steps)

1. duplicate the grass layer
2. gaussian blur the new layer
3. invert the blurred layer
4. desaturate the now inverted, blurred layer
4. switch layer mode to overlay
5. play with the opacity if required
6. merge down
7. adjust levels (if desired)

Try it to see how it works. Depending on the blur radius, the effect will vary.

-Rob A>

What you are doing here is generating the low pass version and removing that from the image leaving the high pass only which would even out the brightness. Its that step of desaturating thats a bit odd. What I reckon you need for this technique is to take an image and call it A. Clone it to B and again to C. Take C and blur it so massively that its one uniform shade. Take B and remove C from it - thats sort of like the ultimate desaturation. Take that result and blur it a little and then remove this image from A. Then you would be removing the low frequencies but not the DC component so it should give the high pass but keep the DC colour. Its the same as doing the high pass and adding back in the DC of course as its A - (B - C) which is A - B + C. I'm still not sure how you can actually achieve this without the colour values going negative which would be clamped and then it wont work correctly. The only way I can see of getting around this is to split the images up into parts lighter than DC and parts darker than DC and process separately. I'll try this out offline and see if I can get that to work.