9.5.2

846 • CHAPTER 18
MATERIAL EDITOR • 847
In the Intensity (Centered) mode, the displacement can take place in both positive and negative
directions. A gray value of 50% results in no displacement. White produces maximum positive
displacement, while black produces maximum negative displacement.
Red/Green
The displacement can take place in the negative or positive direction according to the red and
green values in the texture. Green values raise the displacement, red values lower the displacement.
A black color results in no displacement, it is purely the red and green components that control
the displacement. A pure green (RGB: 0,255,0) and a pure red (RGB 255,0,0) lead to maximum
displacement in the positive and negative directions respectively.
RGB (X,Y,Z Local), RGB (X,Y,Z World)
Without displacement (left), with Type set to RGB (X,Y,Z Local) (center) and RGB (X,Y,Z World) (right).
These two modes control the displacement spatially according to the texture’s RGB components. The
components dene the following directions: Red=X, Green=Y, Blue=Z.
To use polygon coordinates for the displacement, choose RGB (X,Y,Z Local). To use world coordinates
instead, choose RGB (X,Y,Z World). In general, local coordinates produce the best results because they
take the directions of the individual polygons into account.
Texture, Mix Mode, Mix Strength
For details on these settings, look up ‘texture settings’ in the index.
Illumination
The global illumination and caustics parameters will only be available if you have installed the optional
Advanced Render module. These parameters are described in the Advanced Render manual.