Alpha Channel Help

[jbw]

I'm a little baffled but are you trying to remove a white halo from around a selection?

If so make your selection then go Select>Modify>Contract

New window will appear - specify the number of pixels you want to contract the selection by then invert selection and fill with black. This should do the job.
If you could post a pic or explain the end result you're looking for - I could probably help you further.

ta,
jbw

[ubh]

lol sorry I get so deep into my work I sometimes exspect everyone to be on the same page ;) but yeah see im working on tree,grass,flower, mic models but I get the white out lines in my see through alpha channels here are somepicture

Here is a picture of the alpha texture active in 3dsmaxs' material editor see them white nasty outlines along the edge of what to showup in the texture? blah ugly :)
http://www.bigfootstudios.com/images/Clovermaterial.jpg

Here is a picture of the texture being used on a model and you can planly see the white outline in the texture and it become way more noticealbe in game play.
http://www.bigfootstudios.com/images/Clovercompleat.jpg

I am going to try your tip see if it works but hopefuly this help give a better idea of what im trying to get at.

[jbw]

I presume the original texture sits on a white background then. :)
Your problem comes about due to the anti-aliasing of the flower to white background being different to the anti-aliasing of your selection, plus the selection might encompass some pixels that aren't necessary.
This results in the white halo you see around your image. You can solve this by shrinking the selection slightly with the contract command.

What I tend to do is:

Load the clover in PS and make selection of the flower/leaf/grass.
Use the contract command (of 1 or maybe 2 px) to shrink it slightly.
Use Ctrl+J to copy this selection of the clover to a new layer.
Make a new layer below this new layer and fill it with something like bright blue. If you've got stray white pixels they'll show up.
Go back and amend selection or contract further. Continue checking against blue background until happy.
Use this final selection to fill alpha material with white. Save out and test in Max.
You could also replace the white background of the leaf with a coluor closer to the base colour of your clover.

This should get rid of it (unless you're doing something special in Max's material editor).

ta,
jbw

[ubh]

Aww yes you have been veary helpful, the contract command works WAYYYYYYY better than turing magic laso to like 10 and useing shift/alt to get the laso a tighter fit HAHAHA. BTW please have a look at my Job Opertunitys thread http://www.cgtalk.com/showthread.php?t=167818

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