In this video of a head sculpt created by Majid Esmaeili, we get a taste of some of the soon-to-be-released free update features in ZBrush4 R2b, like the new global shadow and ambient occlusion multipliers that have been added to the BPR renderer. Also mentioned is the new capability in the Material Mixer which via a new added filter, will allow you to utilize cavity shading in all shaders.
"About using Z4R2b in this render...
In the previous Z4 version, we introduced the capability for each shader within a material to have its own settings for shadows and ambient occlusion strength, which allows for more control over the look of a material. In Z4R2b, new global shadow and ambient occlusion multipliers have been added to the BPR renderer. This enables you to test different strengths of shadows and ambient occlusion by simply modifying these two sliders without having to visit each shader individually. In Z4R2b, there are also similar global multipliers for the Ambient, Diffuse and Specular strengths. These enable you to adjust properties globally, again, without the need to visit each shader to adjust its ambient, diffuse or specular values. These features do not introduce new capabilities to ZBrush, they are simply intended to streamline ZBrush features. However, there will be several new features that add capabilities not currently available in Z4R2. As an example, the Material mixer has a new filter added which allows the opacity of a shader to be controlled by cavity. In earlier versions of ZBrush, cavity shading was only available with MatCaps. in Z4R2b, all shaders can now utilize cavity shading. There will also be enhancements in other parts of ZBrush. ZBrush4 R2b is planned to be released before the end of the month as a free-of-charge upgrade to all registered users."
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