合成皮肤着色器

合成皮肤材质能赋予物体如硅胶、乳胶或橡胶般的半透明质感。预设材质会结合折射和次表面散射效果，再加上底色和面漆颜色，这样一来，物体表面的颜色就会与内部（体积）颜色有所不同。许多预设材质都有两种表面颜色和两种内部颜色。灯光的位置至关重要，它能充分展现预设材质的所有特质。大多数宣传图片都是在相当昏暗的环境中渲染的，采用轮廓光或背光，将光线散射到人物或道具内部，从而营造出发光的效果。 为了增强发光效果，还可以在道具内部放置点光源、聚光灯和网格灯。此外，预设材质还包含多种凹凸贴图工具，支持平铺、边缘圆滑处理以及调整凹凸强度。这些工具可用于任何应用了 Iray Uber 材质的表面。所有预设材质都使用了 Iray Uber 材质，因此可以通过常见的通道（如光泽度、粗糙度、折射、次表面散射和剪切不透明度）来调整物体表面及体积效果

Synthetic Skin Shaders give surfaces a translucent quality like silicone, latex, or rubber. The presets use refraction and subsurface scattering along with base color and topcoat color so the surface color differs from the internal (volumetric) color. Many of the presets have two surface colors and two interior colors. The placement of lighting is essential to bring out all of the qualities of the presets. Most of the promo images were rendered in a fairly dark environment with rim lighting or backlighting to scatter light inside the figure or prop. This creates a glowing effect. Point lights, spotlights, and mesh lights can also be placed inside props for an enhanced glowing effect. Several bump map utilities are included along with options for tiling, rounded edges, and bump strength. These tools can be used on any surface that has the Iray Uber shader. All presets use the Iray Uber shader so the surfaces and volumetric qualities can be adjusted using familiar channels like gloss, roughness, refraction, SSS, and cut-out opacity.