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RPF Files 681
unless a map has been applied that uses the
coordinates.
Normal—Displays the orientation of normal
vectors as a grayscale gradient. Light g r ay surfaces
have normals pointing toward the view. Dark gray
surfaces have normals pointing away from the
view.
Non Clamped Color—Displays areas in the
image where colors exceeded the valid color
range and were corrected. The areas appear as
bright saturated colors usually around specular
high lights.
Coverage—This saves the coverage of the surface
fragment from which other G-buffer values
(Z Depth, Normal, and so on) are obtained.
Z-Coverage values range from 0 to 255. To see Z
Coverage,rendertoanRLAfileafterfirstchecking
Z Coverage in the Setup subdialog , then choose
Z-Coverage in the rendered f rame window’s
Viewing Channel drop-down list.
TheZ-Coveragefeatureisprovidedprimarilyfor
developers, and should aid in the antialiasing of
Z-buffers.
Descriptive Information group
This information is saved with the file.
Description—You can enter descriptive text here.
Author—Youcanenteryournamehere.
RPF Files
RPF (Rich Pixel Format) is the format that
supp orts the ability to include arbitrary image
channels. While setting up a file for output, if you
select RPF Image File from the list, you’ll go to
the RPF setup dialog. Once there, you can sp ecify
what channels you want to w rite out to the file.
RPFfilesreplaceRLAfilesastheformatof
choice for rendering animations requiring further
post-production or effects work. Many channels
available in RPF fi les are exclusive to this format.
Tip: Whenyoucreateasceneyouplanto
render as an RPF file for use with the Autodesk
Combustion™ product, turn on Render Occlude
Objects (on the
Object Prop ert ies dialog (page
1–111)
)forobjectsinthescene.Thisisimportant
if you want to use the Combustion G-Buffer
Extract feature. When Render Occluded Objects is
enabled and you extract an object in Combustion,
the objects behind it are dr awn correctly. If Render
Occluded Objects is disabled (the default), objects
behind the extracted object appear with black
holes where they were occluded.
Interfa ce
When RPF is the chosen output f o rmat, clicking
Render or Setup on the
Render Output File dialog
(page 3–8)
displaystheRPFImageFileFormat
dialog.
Standard Channels group
The standard channels are RGB color and the
alpha (transparency) channel.
Bi ts per Channel—Choose 8, 16, or 32 Floating
Point as the number of bits per channel. Default=8.
Store Alpha Channel—Cho ose whether to save the
alpha channel. Default=on.
Premulti ply Alpha—When on, premultiplies the
alpha channel. Default=on.