Turbulence FD matte object


#1

Hi guys
I’m using Krakatoa to render some Xparticles which are being advected by a TFD sim. The particles are burning embers being spat out by the fire, so I need to be able to comp them on top. Is there a way of getting Krakatoa to recognise the TFD sim as a matte object so it occludes the rear facing partivles?
Cheers


#2

you could render the TFD Container Fluid directly in Krakatoa as well and colorize the particle black for instance. This way you would only see the desired Xparticles in front.


#3

Ah yes, of course. I’ll give that a try. Thanks a lot.
B


#4

Just an update.
This technique did work but had a draw-back.
Because I need to use motion blur for the embers, the render time went up massively because it was applying this to the TFD fluid as well. I can do the MB in post but this isn’t as good as Krakatoa.
Does anyone have any thoughts?


#5

alternative you could try to mesh the turbulence fd cache, which would require some workarounds as well though.


#6

Another good idea -thanks. I’ll try and skin the sim I’m xParticlres and see what happens.