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raw-m
08-11-2010, 10:44 AM
Hi all. I'm a recent proud owner of the excellent exrTrader plugin from db&w. I've used it a couple of times experimentally and the additional buffers have been really useful. I'm now at a point I want to get the most out of it.

I'm an After Effects user and my first goal is to basically recreate an f9/f10 render using the buffers. There are so many of them!! Can anyone point me to examples of a basic setup that shows me which buffers I need, what layer order and what layer mode to apply?

An AE screen shot to get me off the mark would be great? (Sorry if I'm in the wrong forum :))

My ultimate goal is to get a separate light pass at the moment, but basics first!

3dWannabe
08-11-2010, 05:29 PM
, unfortunately not all of the buffers available in exrTrader.

That should be changing ?soon? . I believe the next version of exrTrader is supposed to support the buffers that Gerardo outlined in the article titles 'Nah! You canít do that with LightWave!' in issue #30 hdri3d

http://www.hdri3d.com/index.php?option=com_content&view=category&layout=blog&id=163&Itemid=100

The article uses dpont's plug-in

http://dpont.pagesperso-orange.fr/plugins/nodes/DP_Filter.html

I believe that Janus will be updated around the same time.

http://janus.faulknermano.com/
http://www.newtek.com/forums/showthread.php?p=801414

Trust me on this - to make the multi-pass magic work, you need both exrTrader and Janus.

There's an article coming out on the new version of Janus in hdri3d soon.

3dWannabe
08-11-2010, 06:15 PM
I think you misunderstand 3dWannabe. I'm not talking about the supported buffers, I'm talking about the buffers being discussed in the tutorials at VFX Haiku. :)

KAT is supposed to be (hopefully) working on a tutorial that shows what all of the buffers available in exrTrader can be used for - THAT's what we need. We've got all of this stuff we can get out of exrTrader, but HOW can we use it? If you're a compositor then you may have a good idea already. Since I am not a compositor - and WANT to know how to do things - knowing how you can combine these various layers - as the original poster asked - would be a great big help. (I love those hypens, don't I? :))

I use Fusion and bought the vfxHaiku compositing video a while back (although I need to look at it again).

I think you are saying the video uses buffers that are not currently supported by Lightwave? I ?think? that many of these buffers that you currently can't get - can be gotten using dpont's plug-ins and Gerardo's techniques.

But - until exrTrader is updated, that's not an option (at least when using exrTrader to output them).

Is there a thread where KAT is discussing this? I'd certainly be interested, as I'm really just beginning to tie all this together, and there are a LOT of folks who would love to see more on the proper use of all buffers.

BTW - In Gerardo's very long (maybe 20 pages) article, I believe he said that all the buffers could be obtained using a composting app from the currently supplied Lightwave buffers (you subtract x from here, y from there, and voila ... ).

Now that would make an interesting video!

geo_n
08-11-2010, 11:09 PM
Trust me on this - to make the multi-pass magic work, you need both exrTrader and Janus.

There's an article coming out on the new version of Janus in hdri3d soon.

So how do you find using janus now as I know you recently bought it? The last time I tried it, it was very confusing for me. And breaking out scenes into many scene files is not ideal at this age.
The way Kat does his render passes is similar to what I do in lw or 3dmax except that in 3dmax it has better scene management to do render passes easily in one max file. I guess this is not possible in lw for now. Hopefully passport is updated or something similar is made in lw 10.
Anyway have a look how I work with only one max file getting all masks, object id, buffers, etc.
http://www.youtube.com/watch?v=ichhVEMuDmE

This is the very first video I learned compositing from which uses basic passes and import to AE
http://tysonibele.com/Main/Tutorials/roboBall/roboBall.htm

3dWannabe
08-12-2010, 07:57 AM
So how do you find using janus now as I know you recently bought it? The last time I tried it, it was very confusing for me. And breaking out scenes into many scene files is not ideal at this age.
The way Kat does his render passes is similar to what I do in lw or 3dmax except that in 3dmax it has better scene management to do render passes easily in one max file. I guess this is not possible in lw for now. Hopefully passport is updated or something similar is made in lw 10.
Anyway have a look how I work with only one max file getting all masks, object id, buffers, etc.
http://www.youtube.com/watch?v=ichhVEMuDmE

This is the very first video I learned compositing from which uses basic passes and import to AE
http://tysonibele.com/Main/Tutorials/roboBall/roboBall.htm
Janus does have a learning curve. It's best to watch some of the Janus videos and the cageman videos. You'll quickly find that a small number of commands will generally meet your needs.

Very easy to use once you go thru the steps to break out a few render passes. Just takes a few seconds.

When Janus breaks out your scene into many scenes, those are just temporary files used to create the exr passes. Your main scene remains the same, and you can completely change your Janus setup and generate new breakout scenes in seconds. Totally flexible.

In theory, you should be able to massively reduce your render times, as you can specify at a very low level which parts of the scene get different levels of AA, etc. (almost any render setting can be overridden)

I'm quite happy with it. Well worth the learning curve needed for any tool with great power.

The only downside is that you'll find you want to certain feature and maybe email Lernie, and be embarrassed because it is already in Janus and documented in the manual.

In the end, it will save you a lot of time.

raw-m
08-12-2010, 10:40 AM
I have to be honest that I'm disappointed that an F9 render can't be re-constructed from the default buffers (the psd exporter can - don't it have access to the same buffers?). I'll look forward to the video tutorials that was mentioned - please add a post when it becomes available!!

Unfortunately (in the LW world, anyway!), I'm a Mac user so Janus isn't an option to me. I'm in a similar position to Megalodon in that I'm not a compositor by trade and finding resources in this area is v. difficult!