Read a texture file. @parameters
firstChannel: First channel offset to be looked up for Filename.
invertT: Unlike RenderMan, Maya’s UV have the T value inverted. For the models created in Maya, Invert T needs to be ON so that the texture orientation will be correct in the render.
hueMode: Centered: The amount of variation will be centered around the current value.
saturationMode: Centered: The amount of variation will be centered around the current value.
luminanceMode: Centered: The amount of variation will be centered around the current value.
gammaMode: Centered: The amount of variation will be centered around the current value.