# trees and alpha channel

**URL:** <https://forums.chaos.com/t/trees-and-alpha-channel/33135>\
**Category:** General\
**Created:** [January 28, 2009, 10:48pm UTC](https://forums.chaos.com/t/trees-and-alpha-channel/33135 "2009-01-28T22:48:19Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![sbarbo](https://avatars.discourse-cdn.com/v4/letter/s/e274bd/32.png) [@sbarbo](https://forums.chaos.com/u/sbarbo)\
**Post date:** [January 28, 2009, 10:48pm UTC](https://forums.chaos.com/t/trees-and-alpha-channel/33135/1 "2009-01-28T22:48:19Z")

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Hi guys!  
I’m new and i check often in this forum tryng to solve my problems…  
now i had to post a question…  
I do interior designs and from few months i start using vray for sketchup but now i had to do my first exterior and the problem is:  
HOW CAN I RENDER TREES?  
can i assign an alpha channel to a cutout tree on a plan like i used to do in previous software?(and if so, someone please can light my way? ???)  
and if not there is another way, avoiding to insert 3d plants? i can’t even place them!!  
here there’s one of the images,  
[http://img443.imageshack.us/img443/5691/17824105ja8.png](http://img443.imageshack.us/img443/5691/17824105ja8.png)  
it will be modified in Ps but insert there trees and shadows it’s too much work!!  
can anybody helpme?

Thanks,  
LoSbarbo

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**Author:** ![Jackson\_cg](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/jackson_cg/32/15728_2.png) [@Jackson\_cg](https://forums.chaos.com/u/Jackson_cg)\
**Post date:** [January 29, 2009, 3:08pm UTC](https://forums.chaos.com/t/trees-and-alpha-channel/33135/2 "2009-01-29T15:08:03Z")

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Re: trees and alpha channel

Make a grayscale clipmap from your diffuse bitmap in a photo editing program and load that into the the “Transparency” slot in the VfSU Texture Editor.

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**Author:** ![sbarbo](https://avatars.discourse-cdn.com/v4/letter/s/e274bd/32.png) [@sbarbo](https://forums.chaos.com/u/sbarbo)\
**Post date:** [January 29, 2009, 8:31pm UTC](https://forums.chaos.com/t/trees-and-alpha-channel/33135/3 "2009-01-29T20:31:14Z")

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Re: trees and alpha channel

Thank you Jackson… ;D  
You saved my life!

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**Author:** ![Jackson\_cg](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/jackson_cg/32/15728_2.png) [@Jackson\_cg](https://forums.chaos.com/u/Jackson_cg)\
**Post date:** [January 29, 2009, 9:29pm UTC](https://forums.chaos.com/t/trees-and-alpha-channel/33135/4 "2009-01-29T21:29:13Z")

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Re: trees and alpha channel

> [@sbarbo](#):
>
> You saved my life!

No problem, I’m just sorry to hear you have such a tough boss! 😉

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**Author:** ![thomthom](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/thomthom/32/62299_2.png) [@thomthom](https://forums.chaos.com/u/thomthom)\
**Post date:** [January 29, 2009, 9:44pm UTC](https://forums.chaos.com/t/trees-and-alpha-channel/33135/5 "2009-01-29T21:44:45Z")

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Re: trees and alpha channel

> [@Jackson](#):
>
> > [@sbarbo](#):
> >
> > You saved my life!
> 
> No problem, I’m just sorry to hear you have such a tough boss! 😉

Haha! ;D

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**Author:** ![sbarbo](https://avatars.discourse-cdn.com/v4/letter/s/e274bd/32.png) [@sbarbo](https://forums.chaos.com/u/sbarbo)\
**Post date:** [February 1, 2009, 1:57pm UTC](https://forums.chaos.com/t/trees-and-alpha-channel/33135/6 "2009-02-01T13:57:51Z")

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Re: trees and alpha channel

Notingh to laugh… 😉  
You can’t even imagine how tought he is!  
By the way… thanks a lot guys!