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Howto:Regional texturing: Difference between revisions
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and in addition allows to generate a very high resolution in the centimeter range close to the ground. Basically if you understand and use procedural techniques, even for textures with lots of structure tiling ceases to be a problem and you can focus on dealing with the landclass seams. | and in addition allows to generate a very high resolution in the centimeter range close to the ground. Basically if you understand and use procedural techniques, even for textures with lots of structure tiling ceases to be a problem and you can focus on dealing with the landclass seams. | ||
One factor to consider is hue blending. If you look at real aerial photographs of a region, you'll notice that soil has the same color everywhere. For instance, North Carolina has a fairly reddish soil. You see that color on bare patches of grass, but also on forest clearings, in gardens - everywhere. Because it's the same soil everywhere. Similarly, vegetation tends to have the same hue in a region, regardless of whether it is in a suburban garden or in the countryside. | |||
Now consider texturing the shrubland of a region with olive green vegetation on reddish patches of soil - and then the suburban regions with ochre soil and lush bright green vegetation - the result is an obvious visual mismatch. | |||
Compare this scene of the French Alps with multiple different hues of green and ground | |||
[[File:Alps-custom-france-scenery.jpg|500px|Lack of hue blending.]] | |||
with a hue-blended scene of the same scenery: | |||
[[File:Procedural01.jpg|500px|Lack of hue blending.]] | |||
to see just how important hue blending is. Procedural overlay texturing techniques are an excellent tool to do such blending, because they allow e.g. to keep the base texture the same across two landclasses and only vary the overlay layers to mark a landclass as different. | |||
By the way, do not aim to remove all vector seams - some of them are there in reality, for instance patches of managed forest in central Europe are characterized by very sharply pronounced boundaries, and so are suburban regions. Aim to de-emphasize only those that have no equivalent in reality. | |||