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making a render with alpha channel
show user profile  jp1979
Hi,

does anybody know how to make a render of a say item of furniture and have the alpha channel included?

The problem is I have a floor but dont want this to show in the alpha channel.... so at the mo I render it twice one time with floor the second without but with no colours....

thought there might be an easier way?

thanks
jp
read 551 times
2/27/2009 5:58:09 AM (last edit: 2/27/2009 5:58:09 AM)
show user profile  Jollabollathan
Render to targa and tick the alpha split box?

read 544 times
2/27/2009 6:01:13 AM (last edit: 2/27/2009 6:01:13 AM)
show user profile  mrgrotey
Use a pure black environmental colour, Give the floor a matte/shadow material (this keeps the shadows but the object will be transparent) and save it as a .png then remove the black layer matte in photoshop to see the correct alpha around the edges




read 542 times
2/27/2009 6:02:05 AM (last edit: 2/27/2009 6:02:44 AM)
show user profile  jp1979
Jollabollathan:
I rendered a test using the split but alpha channel is still all white due to floor covering whole scene?
do I have to set floor to "not be included in alpha channel?"

mrgrotey
when I set enviroment to black and save to png the alpha channel is the same.... when I apply black matt in layers it does nothing?... I have bascially applyed a vray black material to floor with slight reflectany? is this correct?
read 536 times
2/27/2009 6:18:53 AM (last edit: 2/27/2009 6:18:53 AM)
show user profile  mrgrotey
No thats not what I meant but it doesnt matter if you're using vray as its a different materil anyway now, see this thread... (from about half way down, below where I explain the png and tga methods)

http://www.maxforums.org/thread.aspx?tid=499897





read 533 times
2/27/2009 6:21:17 AM (last edit: 2/27/2009 6:23:04 AM)
show user profile  jp1979
thanks mrG.. ill give that a go...

jp

EDIT

thanks works a treat.... .. applied a vray material wrapper to the floor and save to png
read 520 times
2/27/2009 6:54:50 AM (last edit: 2/27/2009 7:20:07 AM)
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