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Procedural texturing: Difference between revisions
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→The gradient texture
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<texture n="13">gradient_texture.png</texture> | <texture n="13">gradient_texture.png</texture> | ||
</texture-set> | </texture-set> | ||
==== The grain texture ==== | |||
The grain texture adds a grainy pattern to the terrain at close distances, giving the appearance of better resolution. The grain texture parses the texture alpha channel as transparency (since it just superimposes a pattern), so here the alpha channel can not be used to encode vegetation effects, and the grain texture may not have a strong color. | |||
[[File:grain_texture.jpg|300px|The grain overlay texture]] | |||
To allow fine-tuning of the grain effect, the texture can be multiplied with the <grain_strength> parameter which sets the overall alpha of the grain effect - a low value works best on bright base textures whereas dark base textures may require a stronger grain. | |||
The default grain texture is grain_texture.png which adds a vegetation-like grain. This can be replaced with other grain patterns or void.png for no grain where appropriate. | |||
* declaration: | |||
<texture-set> | |||
<texture>base_texture.png</texture> | |||
<texture n="11">hires_texture.png</texture> | |||
<texture n="12">overlay_texture.png</texture> | |||
<texture n="13">gradient_texture.png</texture> | |||
<texture n="14">grain_texture.png</texture> | |||
</texture-set> | |||
* parameters: | |||
<parameters> | |||
<grain_strength> 0.5</grain_strength> | |||
</parameters> | |||
The default value is 0.5 and the parameter range is 0 (completely transparent) to 1 (completely opaque). | |||
==== An example ==== | ==== An example ==== | ||