Autodesk 12812-051462-9011 User Guide 3 - Page 2102

■ The vertical scale slider on the left side of the histogram lets you adjust the automatically computed vertical scale. ■ To modify the luminance "window," set X-Axis Scale to Manual and adjust the minimum and maximum values in the numeric fields below either end of the graph. ■ The background coloration indicates several pieces of information: ■ The area between the black and white points is shaded gray. ■ The area below 1.0 (low dynamic range) is a lighter shade of gray than the area with luminance greater than 1.0, the high dynamic range region. ■ The background of the region outside the currently selected blackpoint/whitepoint region is tinted pink. ■ The vertical dotted lines indicate integer spacing (for example, 1...2...3...4). To see these, the maximum luminance value must be greater than 1.0. ■ You can drag whitepoint/blackpoint markers in the histogram to place them visually. The hot-spot is two pixels to either side of the marker line. White point selection is tested first, so if the two lines are right next to each other, the white point will be selected. ■ You can set the display itself to linear or logarithmic mode. Logarithmic display remaps all values greater than 1.0 to a logarithmic curve. The dotted spacing indicators are supplemented by heavier dotted lines that indicate when the scale has changed by a factor of 10. This is useful for most HDR images, as the HDR data is usually spread out over a wide range. ■ Setting X-Axis Scale to Auto mode causes the histogram to encompass the entire spectrum of the image. If you switch back and forth, previous manually set values are preserved and restored. File Loading Parameters group Storage Buffer Format Specifies the format in which the image data is stored within 3ds Max. The base types are variations on 8-bits-per-channel and 16-bits-per-channel integer formats. There are two forms of each: one with alpha (RGBA) and one without alpha (RGB). If you are loading an image with OpenEXR Files | 7357