mental ray Architectural and Design Visualization Shader Library
mental ray Architectural and Design Visualization Shader Library
mental ray Architectural and Design Visualization Shader Library
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
58 2 <strong>Architectural</strong> MaterialGold, silver <strong>and</strong> copper, perhaps?2.6.2.9 Brushed MetalsBrushed metal is an interesting special case of metals. In some cases, creating a brushedmetal only takes turning down the refl gloss to a level where one receives a “very blurred”reflection. This is sufficient when the brushing direction is r<strong>and</strong>om or the brushes are toosmall to be visible even as an aggregate effect.For materials that have a clear brushing direction <strong>and</strong>/or where the actual brush strokes arevisible, creating a convincing look is a slightly more involved process.The tiny grooves in a brushed metal all work together to cause anisotropic reflections. Thiscan be illustrated by the following schematic, which simulates the brush grooves by actuallymodeling many tiny adjacent cylinders, shaded with a simple Phong shader: