Version: 2017.2
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辅助贴图(细节贴图)和细节遮罩

辅助贴图(或细节贴图)允许您在上面列出的主纹理上覆盖第二组纹理。您可以应用第二个反照率颜色贴图和第二个法线贴图。通常,与主要的反照率贴图和细节贴图相比,这些辅助贴图将映射到对象表面上重复多次且小得多的范围。

这样做的原因是允许材质在近距离观察时具有清晰的细节,同时在从更远处观察时具有正常的细节级别,而不必使用单个极高的纹理贴图来实现两个目标。

细节纹理的典型用途为: - 为角色的皮肤添加皮肤细节,如毛孔和毛发 - 在砖墙上添加微小的裂缝和地衣生长效果 - 为大型金属容器添加小划痕和磨损

This character has a skin texture map, but no detail texture yet. We will add skin pores as a detail texture.
This character has a skin texture map, but no detail texture yet. We will add skin pores as a detail texture.
The Albedo skin pore detail texture
The Albedo skin pore detail texture
The normal map for the skin pore detail
The normal map for the skin pore detail
The end result, the character now has subtle skin pore detail across her skin, at a much higher resolution than the base Albedo or Normal map layer would have allowed.
The end result, the character now has subtle skin pore detail across her skin, at a much higher resolution than the base Albedo or Normal map layer would have allowed.
Detail textures can have a subtle but striking effect on the way light hits a surface. This is the same character in a different lighting context.
Detail textures can have a subtle but striking effect on the way light hits a surface. This is the same character in a different lighting context.

如果使用单个法线贴图,请务必将其插入主通道。辅助法线贴图通道比主通道的成本更高,但具有完全相同的效果。

细节遮罩

细节遮罩纹理允许您在模型的某些区域禁止应用细节纹理。这意味着可在某些区域显示细节纹理,而在其他区域隐藏细节纹理。在上面的皮肤毛孔示例中,您可能希望创建遮罩,使毛孔不会显示在嘴唇和眉毛上。

Emission
菲涅耳效应