Texture Mixer
 | Texture Mixer | This node mixes the RGBA components of two textures to a new resulting texture. |
The Texture Mixer node provides possibilities to process and manipulate the RGBA components of up to two source textures. The result of the manipulation is then applied to a geometry. The textures which have to be processed by the shader have to be linked before the shader node in the hierarchy tree.
The manipulation is based on a Matrix-Vector multiplication:
| M11 | M12 | M13 | M14 | R | R' | ||
| M21 | M22 | M23 | M24 | x | G | = | G' |
| M31 | M32 | M33 | M34 | B | B' | ||
| M41 | M42 | M43 | M44 | A | A' |
This means that the new R value is R' = R*M11 + G*M12 + B*M13 + A*M14. Equivalent calculations are perfomed for the new G, B and A values. The matrices for the textures are specified by the input properties Transformation0 and Transformation1. If two textures are applied the resulting texture is calculated by addition of both matrix-processed textures. Furthermore it is possible to add offsets to the single RGBA channels via the ..._Offset properties.
Possible applications for the Texture Mixer node are:
- creating an alpha texture from a grayscale texture
- desaturating a color texture to a grayscale texture
- exchanging two of the RGBA components