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PIC Files 677
source image over which black to white occurs;
that is, to remap the color data. When Color
Transform is on, you can adjust these luminance
and general br ightness controls:
Exponent—The exponent to apply when loading
the file
Black Point—Where black should be in the
luminance range of the image
White Point—The w hite point
RGB Level—A standard multiplier for the RGB data
RGB Offset—An additive offset for the RGB data
Prev iew—The Preview window provides for
interactive previewing of color-transform options
for loading EXR files. After choosing an EXR
file to open, click Preview to enable the preview
window. The image file is loaded into the preview
window, and from then on any changes to the
Color Transfor m options update the thumbnail
in real time.
The preview window ignores the aspect ratio of
the image to make the most of the small screen
space available.
Plugin About—Opens a dialog that shows
information about the OpenEXR plug-in.
File Info—Opens the File Information dialog (page
3–677)
, which lets you view file statistics plus any
attributes and channels stored in the file.
OK —Accepts any changes, closes the dialog, and
opens the image file.
Can ce l—Discards any changes and closes the
dialog without loading the image file.
File Information dialog
This read-only dialog displays basic file statistics
including date, time, size, and resolution, plus any
attributes and channel information stored with
the file. See
Extra Channels and Attributes (page
3–673)
.
PIC Files
3ds Max can import and export Radiance Picture
(PIC) files. The PIC file is a lighting-analysis
format used for the same purpose as LogLUV
TIFF
files (page 3–684)
. The PIC format differs from the
LogLUV TIFF format by creating separate files for
luminance (page 3–1058) and illuminance (page
3–1049)
channel data (the LogLUV TIFF format
creates one file containing
both channels).
One way to create PIC files is with the
Lighting Data
Exporter utility (page 3–299)
.Youspecifyafile
namebyclickingtheFileNamebutton.Whenyou
click Export, the Lighting Data Exporter renders
two files. The string “_Illuminance” is appended
to the name of one file, and “_luminance” is
appended to the other. For example, if you type
house as the file name, the exporter renders to
house_illuminance.pic and house_luminance.pic .
You can also open and save high-dynamic-range
images in the PIC format using the Radiance