rakkaka Posted December 17, 2008 Share Posted December 17, 2008 i try to achieve this effect with just a part of an image you can find it here: "Blowing an image away using particles" on http://www.sidefx.com/index.php?option=com...&Itemid=132 i use a pre-multiplied image (with alpha channel).... but i don't find a way to select or use just this area for getting particles with the ride size. when i select just the range of the alpha i can not use $BBX/$BBZ... maybe someone has an idea or a hint where to look?!?!?! is there a way to do it with some VOP nodes...???? thanks Quote Link to comment Share on other sites More sharing options...
jacys Posted April 29, 2009 Share Posted April 29, 2009 i try to achieve this effect with just a part of an imageyou can find it here: "Blowing an image away using particles" on http://www.sidefx.com/index.php?option=com...&Itemid=132 i use a pre-multiplied image (with alpha channel).... but i don't find a way to select or use just this area for getting particles with the ride size. when i select just the range of the alpha i can not use $BBX/$BBZ... maybe someone has an idea or a hint where to look?!?!?! is there a way to do it with some VOP nodes...???? thanks kill when color equal black? Quote Link to comment Share on other sites More sharing options...
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