Type – Specifies the transfer function for the loaded image file.
None – No correction is applied; Inverse gamma – The transfer function is controlled through the Inverse Gamma parameter. sRGB – The loaded image is considered in sRGB transfer function; From 3ds Max – The gamma is controlled from 3ds Max gamma settings (Customize -> Preferences -> Gamma and LUT). Auto – Automatically determines the color transfer function. If a bitmap file name contains the string "_srgb" the transfer function is sRGB. If a bitmap file name contains the strings "_lin_srgb" or "raw", no correction is applied. For bitmap files with 8 bits per color componentand , 3 or 4 color components (like png, jpg, and other) and no suffix, the transfer function is sRGB. In all other cases, no correction is applied.
Inverse gamma – A gamma–correction value for the image. For example, if the bitmap was saved to disk with a 2.2 gamma correction, you need to enter 0.4545 to remove that correction for the rendering.