Full transcript
0:00hi everyone in this video i would like
0:02to briefly talk about saving your
0:04renderings and file formats so after you
0:07hit f12 in blender your picture will
0:10render
0:11and you can save it going to those
0:14options here
0:15or by pressing shift s
0:18once we do that there are multiple
0:22file format options we can choose from
0:24so let's go through most of them the
0:27most important ones the jpeg is a
0:29standard
0:30graphics file you would use for preview
0:33renderings i don't recommend using jpegs
0:36if you want to apply post production
0:38later but let's
0:40let's save it
0:42and we will see how it works in the
0:45later stages the quality i would go for
0:48100 if using jpegs
0:51now the second file format
0:53i would be actually recommending using
0:55would be png either in 8 or 16 bits
1:00for post production i would switch to 16
1:03bits because that gives us a little bit
1:04more color information within the
1:07picture to play with
1:09and the third file format i also
1:12recommend using especially if you want
1:14to apply your post production directly
1:16in blender
1:18is the open xr
1:20format because it saves our image in 32
1:25bits and what it means is
1:29i will close the rendering window right
1:30now and go to the compositing here this
1:33is in general the area
1:35where we will perform post-production
1:38directly in blender so as you can see
1:40i'm clicking use notes here
1:42and this is the very basic setup that
1:45will be available
1:46nothing really happens within the window
1:48itself so i'm going to press shift a
1:51choose output and viewer now when i have
1:54a viewer within this setup i'm able to
1:58plug it into the image output and have a
2:01preview of what's happening within the
2:04compositor sometimes when you have those
2:05borders
2:08in the
2:10older blender 2.80 versions you can
2:13just
2:14update it by switching this icon here
2:17and we can hide this tab by pressing the
2:20n key
2:21so let's go full screen right now and
2:23see
2:24what we can do here
2:26the main reason i'm bringing up the
2:28compositor at this point is because once
2:31we render an image in blender it will be
2:34saved within the compositor but if we
2:36restart blender this input
2:39from the lender render layers will be
2:42gone unfortunately blender doesn't keep
2:45it inside and you might ask
2:48why would we
2:50need it well let me show you
2:52if we let's say add and rgb curves
2:56to our node setup here and
3:00decrease them
3:01you can see
3:02we are having a lot of color and light
3:06information within the picture itself so
3:08it's basically non-destructible as long
3:12as we are keeping
3:13the original rendered file within
3:16blender
3:17and
3:18if you restart blender you will lose it
3:21so the way
3:22to avoid re-rendering everything over
3:25and over again is saving your files to
3:2932-bit format which was the xr file that
3:34i showed you just a second ago
3:37as you can see i'm running a completely
3:40new and clean blender file and let's go
3:42to the compositing enable the notes
3:45again and this is what you will get by
3:47default so nothing in the render layers
3:50because we didn't render anything but if
3:52i press shift a
3:54and choose input image
3:57here i can choose well an image
4:01let's do that right now and let's choose
4:03the xr file that we have saved before
4:08once i
4:09move it
4:10to the compositing composite node and to
4:14the viewer node
4:17this is
4:18basically the same setup we
4:20had in our original blender file i can
4:23delete this node because we will be
4:26using this blender file only for
4:28compositing so
4:31you might have noticed i'm able to
4:33zoom in zoom out the image i do this by
4:36the v key
4:37v zooms out alt v
4:40zooms in and when i
4:44sorry when i press the middle mouse
4:45button i'm able to pan the note setup
4:48and with alt middle mouse button i'm
4:50able to pan around
4:52with my
4:54uh background image
4:56to show you the main differences between
4:58the 8 16 and 32 bit files let's
5:02add and rgb curves again
5:06plug them here and let's say
5:09go down like that
5:11so you can see
5:13um
5:14we are kind of preserving a lot of
5:17details around the images
5:19uh the different outputs i'm getting
5:21while playing around with the curve
5:24let's now duplicate this note by
5:26pressing shift d
5:28and let's
5:29choose the 8-bit jpeg file
5:32so i'm going to also
5:34duplicate the viewer node
5:38and
5:40you can see i think
5:44directly just by plugging in the notes
5:47the difference in the image
5:50is visible so here we have everything
5:52flattened out and not that many color
5:56details as in the 32-bit image
6:00let's also import the png file
6:07and let's copy the viewer
6:12so yeah the png file even though it has
6:1516 bits it gives us more or less the
6:18same result if we import the files to
6:20photoshop
6:21this is not happening because blender
6:24well tries to
6:27get as much of
6:28the color information from 30 bits as
6:32possible that's why it's making those
6:35images appear flat
6:37if we copy the curves and plug them in
6:40you can see
6:42by going down with the curve we get
6:46way less light in those areas here
6:49uh in a difference to
6:53to this node setup
6:57so if we compare them
6:59you can see yeah the quite a lot of
7:02information is lost here
7:04another example how we can
7:07actually
7:08present the 32-bit information or a
7:1232-bit image
7:14in contrast to 8 or 16 bits it's using
7:17the filter and it's going to be
7:20glare for example
7:23if i plug it into
7:25the 32-bit file you can see we are able
7:28to get those nice highlights those
7:32effects uh
7:34from the very bright highlighted areas
7:37when
7:38if i plug it into the jpeg file
7:41basically nothing happens because
7:44blender and the file itself doesn't have
7:46any more light information about those
7:49areas so it's not
7:51possible to generate this effect
7:55so to sum things up
7:57in general if you want to do the post
7:59processing directly in blender later
8:02during the project development you have
8:04to save your
8:06render files to 32 bits which will be
8:10the
8:10open or simple the xr file format
8:16if you want to do the post processing in
8:18let's say photoshop or i would
8:20recommend sticking to the png file 16
8:23bits you can use eight bits as well if
8:26you want to but i would recommend 16
8:28bits and if you simply want to save the
8:31render previews do some quick renderings
8:34then i would stick to the jpegs because
8:37it's not that important to have all of
8:39that extra information in just a preview
8:42file
8:43thank you guys for watching this video
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