# Premultiply issue (2)

**URL:** https://forum.highend3d.com/t/premultiply-issue-2/45150
**Category:** Maya
**Tags:** mental-ray
**Created:** [December 17, 2010, 11:36pm UTC](https://forum.highend3d.com/t/premultiply-issue-2/45150 "2010-12-17T23:36:27Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![terraformers](https://forum.highend3d.com/letter_avatar_proxy/v4/letter/t/ccd318/32.png) [@terraformers](https://forum.highend3d.com/u/terraformers)
#### Post date: [December 17, 2010, 11:36pm UTC](https://forum.highend3d.com/t/premultiply-issue-2/45150/1 "2010-12-17T23:36:27Z")

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whats the proper way of composting 2 elements in the same scene in maya and after effects?  
 i want my background on a pass and my car on another, so:  
 -i am rendering&nbsp; the background with primary visibility checked off on my car for the 1rst pass  
 -and a second pass with primary visibilty checked off fpr my background geometry this time  
 -premultiply checked off in frame buffer MR options  
 -i just cant the same result as my beauty pass, there is always a gray line around around my car silhouette

here are the results:  
 [http://www.youfile.net/download.php?file=3f5a37939cbc460aaae87d54f9f9c4fe](http://www.youfile.net/download.php?file=3f5a37939cbc460aaae87d54f9f9c4fe)

and here is the PSD with the 2 images overlayed:  
 [http://www.youfile.net/download.php?file=bc36b33f85bcd943e85d42e6986bf0c5](http://www.youfile.net/download.php?file=bc36b33f85bcd943e85d42e6986bf0c5)

\*i also tried with premultiply checked on in Maya, and for both cases i tried the 2 alpha import options in after effects, same problem.

what am i doing wrong , what is the proper workflow to obtain the exact result from the beauty pass?