Page 67 - 3D World - October 2017

TuTorials
Create a portal effect

plAy wIth phySIcS DuplIcAte the eMItteR
06 Things should be shaping up now. Let’s move to 07 A single emitter, in this case, just wasn’t very effective, even if we
nParticleShape node and change Mass (0.3, in this case) bumped the particle rate all the way up to a high amount. So we decided to
under the Dynamic Properties tab. This should make your duplicate the emitters, which can be a bit tricky. Create a new emitter, it’ll ask
particles light so wind can displace them, the way real for the nucleus node you want to use, give it the nucleus you have already.
sparks behave. Move to the Nucleus node and under the Now, to copy an attribute from the existing emitter, all you need is to select
Gravity and Wind tab, change the Wind Speed, Wind the node, click Presets in the top-right corner, save the preset and then load it
Direction and Wind Noise (2.747, all to 1, 50, in this case). to the new emitters.

play with
frame rates
If your portal is more
hexagon than circle,
the emitter is probably
orbiting too fast.
Go to the Animation
Preferences. Set the
Playback Speed to
‘Play every frame’ and
set Playback by to
below 1. The value of 1
InStAncIng the geoMetRy RenDeRIng means that during the
08 If you’re using Maya 2017, which ships with Arnold, 09 To render this out, we suggest using V-Ray. We simulations, it’ll do a
you might’ve noticed it doesn’t work well with some got the best results from V-Ray but if it’s out of budget, simulation only once
nParticles. So you can either use another renderer or use to render just the particles, try and use Maya’s software but if you change it to
geometry instancing. It’s a simple process. Just create a renderer or any other built-in renderer. That is fine for something like .1 then,
geometry, select it first and nParticleShape later and in just the particles and you can deal with the rest in post. it’ll simulate 10 times
the nParticles menu, select Instancer. This’ll take out the You can’t render motion blur with just the particles so in a single frame. It’s a
colouring effects but at least you’ll be able to render. instance it before you do, or add it in post. little thing but it helps.

coMpoSItIng
10 Compositing this is
fairly simple. You only have
to add some motion blur
to the particles, some glow
and roto on the footage
inside the portal. We
would suggest duplicating
the portal. Make one
on them white, using
something like a choker
to cut it on the edges and
the other one orange and
then adding a lot of glow
on it with high radius.
However, this might not
work if you’re rendering
using V-Ray.

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