v.exponential v.exponential outputs a brightness v.exponential outputs a brightness calculated as: ( 2 ^ ( input brightness * pre-gain / 32 ) ) * post-gain This is a floating point calculation. It can operate on int8, int32 and float32 images in all formats. v.exponential tends to make dark areas much darker, while maintaining the brightness of the brightest parts of the image.	from the library : softVNS Format : External Environment : jitter / max commercial Max 4.x http://homepage.mac.com/davidrokeby/softVNS.html