Keyframed Transparency
From scripting
//Author Nicholas Pisca Copyright 2005 //creates a keyframed transparency transition by getting a Z-translate attribute int $iii = 0; $jump = `ls -sl`; int $sizejump = size($jump); do { float $ht2pre = `getAttr($jump[$iii]+".translateZ")`; float $ht2 = $ht2pre * 4; string $nicklambert = "nicklambert"+$iii; string $nicklambertSG = "nicklambert"+$iii+"SG"; string $nicklambertoutcolor = "nicklambert"+$iii+".outColor"; string $nicklambertSGsS = "nicklambert"+$iii+"SG.surfaceShader"; string $nicklamberttrans = "nicklambert"+$iii+".transparency"; shadingNode -asShader lambert -n $nicklambert; renderCreateBarCB -asShader "surfaceShader" lambert; sets -renderable true -noSurfaceShader true -empty -name $nicklambertSG; connectAttr -f $nicklambertoutcolor $nicklambertSGsS; currentTime $ht2; setAttr ($jump[$iii] + ".visibility") 0; setAttr $nicklamberttrans -type double3 1 1 1 ; setKeyframe $nicklamberttrans; float $iiitra = $ht2 + 3; setAttr ($jump[$iii] + ".visibility") 1; currentTime $iiitra ; float $iiiend = $ht2 + 140; currentTime $iiiend; setAttr $nicklamberttrans -type double3 0 0 0 ; setKeyframe $nicklamberttrans; select -r $jump[$iii] ; sets -e -forceElement $nicklambertSG; $iii=$iii + 1; } while ($iii < $sizejump);
More information on attribute keyframing, read pages 119-122 in YSYT.