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TEXTURE MIXING
IN VUE
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A neat trick in Vue, is to mix several texture images, to hide
any overlap or repetition.
This is very useful on landscapes, rocks and such like.
Say you have several pictures of bark or rock. If you used an
image to cover an entire terrain, odds are high it would lack
enough resolution or it would show areas where it didn't tile
perfectly.
See picture below
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Obviously, this image is far too large in scale for this terrain,
and looks obviously like bark, not some kind of landscape material.
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Here I have used 4 different textures, blended
together using procedural functions. This is a lot better, the
fractal and noise functions I used to blend it, mixes the 4 textures
into a more varied look. But it's too large in scale, you can
still see lichen from the original photo which looks too obviously
wrong.
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This is the function used to create the blend
of 4 textures.
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So what happens when you scale the textures down?
As you can see, the repeating, non-tiling images cause obvious
bands that look fake.
But there is a way to avoid this!
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By using a rotate and twist function in the function editor,
you can warp the original textures before blending, creating more
organic blends and patterns, like the image below shows:
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This is that texture applied to the base of a simple terrain
and given an ecosystem. It looks much more "organic and natural"
However, note the Ground Plane, which has the exact same material
applied, but looks "stripey" and bad. It's because the
ground plane is an infinitely sized object and the rotate
& twist function won't work on it.
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| And here's a pic showing how the function
to add the more natural blend was achieved. Sorry for the size but
clarity is essential I think :) |

I hope you find this of use! :)
All original art, writing on this site, copyright of
Steven James, "Silverblade the Enchanter" ©2010
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