RE: XSI Zpics and Aftereffect

["Sofronis Efstathiou" <SEfstathiou(at)bournemouth.ac.uk>]

Hey Leoung, 
 
Do you mean as a file?  Or in isolation of the .pic file?  As far as I am aware, you need the .pic file and the zpic for this to work, as the zpic file does not have an image header, therefore the size of the Z buffer is taken from the .pic image. They must go together.
 
You can render the zpic seperatley via the Render Channels output found in the Render Pass.  Just add a frame buffer and pick depth, changing the file type to zpic.  But I think you know this anyway.
 
I have some documentation on how to do this if you want to email me offline sefstathiou(at)bournemouth.ac.uk <mailto:sefstathiou(at)bournemouth.ac.uk> 
 
Saf
 

________________________________

From: owner-xsi(at)Softimage.COM on behalf of Leoung O'Young
Sent: Fri 29/02/2008 21:20
To: XSI(at)Softimage.COM
Subject: Re: XSI Zpics and Aftereffect


Hi Luc-Eric,
Thanks for pointing this out to us.
We didn't look hard enough to see the Zpic option....
That probably why the "Zt" is inverted when we renamed to "Zpic"
Is it possible to render the Zpic separately?

Leoung


Luc-Eric Rousseau wrote: 

	Zpics have their advantages.  They are floating point and contain the exact distance to the camera of the each pixel in softimage units, there is no data loss and it's consistent between frames.   Since they are a dump of the Zbuffer, they are not anti-aliased, but that's what you need for Z-compositing. Or at least, that's the best you can do - z-compositing is never great.

	 

	 

	From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of Leoung O'Young
	Posted At: February-29-08 3:11 PM
	Posted To: xsi
	Conversation: XSI Zpics and Aftereffect
	Subject: Re: XSI Zpics and Aftereffect

	 

	Hi Alan,
	
	Thanks for your suggestion we will try out.
	
	Leoung
	
	Alan Fregtman wrote:
	
	

	Does it have to be zpic? I've had good luck saving the depth
	renderchannel/framebuffer of a render as a 16bit *.SGI. Works great.
	 
	As for RPF, it apparently needs to be implemented by mental images and
	they don't feel like doing so, according to this post:
	http://www.highend3d.com/boards/lofiversion/index.php/t161451.html
	 
	Cheers,
	 
	   -- Alan
	 
	On Thu, Feb 28, 2008 at 7:58 PM, digimata <digimata(at)digimata.com> <mailto:digimata(at)digimata.com>  wrote:
	  

		 This is our first venture in using zpic from XSI and sending to our
		 Aftereffect's guy.
		 We are using XSI 6.01 and he is using Aftereffect 7.0
		 We gave him a pic file and a zpic file to test.
		 XSI rendered out a "test.pic" and a "test.zt"
		 It didn't work in Aftereffect until we change the zpic file's extention
		 to .zpic
		 The next problem we have is the zpic data is inverted.
		 
		 Anyone else run into this problem or we doing something incorrect here.
		 
		 The Aftereffect guy enquired why SXI/MR. doesn't generate RPF (Rich
		 Pixel Format) files
		 like many other 3D packages.
		 
		 Thanks,
		 Leoung
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