Relevant to Blender v2.31
The file is saved in whichever format has been selected in the pertinent
Menu button in the
Format Panel (Figure 17.2, “Image types and dimensions.”).
From here you can select many image or animation formats
(Figure 17.14, “Image and animations formats.”).
The default image type is
Targa, but, since the image is
stored in a buffer and then saved, it is possible to change
the image file type after the rendering and before saving
using this menu.
By default Blender renders color (
RGB) images (bottom line in
Figure 17.2, “Image types and dimensions.”) but Black and White (
colour with Alpha Channel (
RGBA) are also possible.
Beware that Blender does not automatically add the extension
to files, hence any
extension must be explicitly written in the File Save window.
Except for the Jpeg format, which yields lossy compression, all the other formats are more or less equivalent. It is generally a bad idea to use Jpeg since it is lossy. It is better to use Targa and then convert it to Jpeg for web publishing purposes, keeping the original Targa.
Anyhow, for what concerns the other formats:
is uncompressed Targa, uses a lot of disk space.
Portable Network Graphics, a standard meant to replace old
GIF inasmuch as it is lossless, but supports full true colour images.
HamX is a self-developed 8 bits RLE
(Run Length Encoded bitmap) format; it
creates extremely compact files that can be displayed quickly.
To be used only for the "Play" option.
Iris is the standard SGI format, and
Iris + Zbuffer
is the same with added Zbuffer info.
uses an "Ftype" file, to indicate that this file serves as an example
for the type of graphics format in which Blender must save images.
This method allows you to process 'colour map' formats. The colourmap
data is read from the file and used to convert the available 24 or 32 bit
graphics. If the option "RGBA" is specified, standard colour number '0'
is used as the transparent colour. Blender reads and writes (Amiga)
IFF, Targa, (SGI) Iris and CDinteractive (CDi) RLE colormap formats.
For what concerns animations:
AVI Raw - saves an AVI as uncompressed
frames. Non-lossy, but huge files.
AVI Jpeg - saves an AVI as a series
of Jpeg images. Lossy, smaller files but not as small as you
can get with a better compression algorithm. Furthermore the
AVI Jpeg format is not read by default by some players.
AVI Codec - saves an AVI compressing
it with a codec. Blender automatically gets the list of your
available codecs from the operating system and allows you to set its parameters.
It is also possible to change it or change its settings, once
selected, via the
Set Codec button which appears
(Figure 17.15, “AVI Codec settings.”).
For an AVI animation it is also possible to set the frame rate (Figure 17.15, “AVI Codec settings.”) which, by default, is 25 frames per second.