I'm pretty sure opacity and color only work if you have a blendMat in there.
-deke On Tue, Jan 3, 2012 at 10:06, Stephen Newbold <stephe...@moving-picture.com>wrote: > Cheers Hugh, > > I'll give this a go. That's kind of what I thought 'color' would do with > a sprite, just act as a multiplier value. Weirdly, opacity didn't do > anything either so hopefully this work around fixes this too. > > Cheers, > Steve > > > Hugh Macdonald wrote: > >> I emailed support@ about just this the week before christmas... >> >> They gave me a workaround, which was to add a BlendMat node after my >> sprite image, before the ParticleEmitter node. >> >> Channels: rgba >> Operation: plus >> Surface blend: modulate >> >> >> I have no idea why this works, but it does seem to, which is good. It >> then behaves as I believe it should - the particle colour is multiplied by >> the sprite colour. >> >> >> Hugh >> >> >> On 03/01/12 14:27, Stephen Newbold wrote: >> >>> Hi, >>> >>> I want to use an particle expression to change the colour of some sprite >>> based particles. Using an expression in the color tab works fine if not >>> using sprites (ie. nothing connected to the particle input of the emitter) >>> but is there any way to alter the color of the sprites themselves based on >>> an expression? I really need to create some IDs for the particles I'm >>> generating and would rather do it this way rather than create and render >>> separate particle sets if possible. >>> >>> Cheers, >>> Steve >>> >>> >> ______________________________**_________________ >> Nuke-users mailing list >> Nuke-users@support.thefoundry.**co.uk<Nuke-users@support.thefoundry.co.uk>, >> http://forums.thefoundry.co.**uk/ <http://forums.thefoundry.co.uk/> >> http://support.thefoundry.co.**uk/cgi-bin/mailman/listinfo/**nuke-users<http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users> >> > > > -- > Stephen Newbold > Compositing Lead - Film > MPC > 127 Wardour Street > Soho, London, W1F 0NL > Main - + 44 (0) 20 7434 3100 > www.moving-picture.com > > ______________________________**_________________ > Nuke-users mailing list > Nuke-users@support.thefoundry.**co.uk<Nuke-users@support.thefoundry.co.uk>, > http://forums.thefoundry.co.**uk/ <http://forums.thefoundry.co.uk/> > http://support.thefoundry.co.**uk/cgi-bin/mailman/listinfo/**nuke-users<http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users> >
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