Overview

A Diffuse map is the most common kind of texture map. It defines the color and pattern of the object. Mapping the diffuse color is like painting an image on the surface of the object.

For example, if you want a wall to be made out of brick, you can choose an image file with a photograph of bricks. A good diffuse texture has no directional light painted in it. Different surfaces reflect light different ways and it should already be visible in the diffuse map.

You should also take care to achieve the right darkness of the texture. Too light or too dark texture will require too much diffuse color compensation which will ruin the final result.

It can be combined with various other maps to create more definition. Some maps which are often overlaid with diffuse are ambient occlusion and cavity maps.

For additional information on best-practices when creating texture maps for Physically Based Shading, see: Creating Textures for Physically Based Shading.

Examples

Vegetation Bush

Diffuse RGBDiffuse Alpha

Decal Puddle

Decal RGBDecal Alpha

Cloud Atlas

Cloud RGBCloud Alpha

Animated Fireball

Fireball RGBFireball Alpha

Tips

Some notes to keep in mind which often determine a good diffuse texture:

  • UV maps are laid out so that there is a decent compromise of space utilization and stretching.
  • No directional lighting information is baked.
  • Cracks or holes have been darkened by painting or by an occlusion map.
  • Base texture features crisp color or contrast to define variations in shapes to break up the image.

漫反射贴图是什么?

这是用于定义主模块颜色的纹理,它不应具有任何光照信息,可和许多其他贴图一起创建更多定义。某些经常被漫反射覆盖的贴图是环境光遮蔽和空洞贴图。

能确定优质漫反射纹理的注意事项:

  • 布置 UV 贴图以便对空间利用和拉伸作出合理退让。* 无烘焙的方向性光照信息。
  • 通过绘制或遮蔽贴图将裂缝和孔颜色加深。
  • 基本纹理功能颜色过于鲜艳或与定义形状变化存在差异都将破坏图像。

 

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