Bubble help

# 1 22-08-2005 , 06:07 PM

Inspector Lee
Join Date: Feb 2005

Location: San Francisco

Posts: 22

I'm creating an underwater shot sequence, and I have a submarine w/ particle emitters attached to each propeller, so that it leaves a small, "corkscrewing" trail of bubbles in the prop wash. I thought it might be better to create geometry for the bubbles and instance them to the particles (so I can render the scene in one pass), rather than using the particle/spheres themselves (w/ a hardware render) and compositing them afterwards (the rest of the scene looks so much better with a software render). My problem is I don't know how to get these "instanced" bubbles to vary in size (which was easy to do when they were particles).
Any suggestions on how I might achieve this would be greatly appreciated.

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# 2 26-08-2005 , 05:19 AM

Registered User
Join Date: Dec 2004

Location: Melbourne, Australia

Posts: 36

Considering it's an instance that's quite a hard problem you ever thought of just making multiple emitters with different sized bubbles that would ease things up a bit.

Or maybe altering the emitter using mel and just telling it what you want to emit using a rand() function for size on your bubble object.

How much mel do you know it might be easier making a loop that creates sphere geometry with a random size then assigns your shader or texture then assigns any physics to it.

Actually that would probably be what you want to do even though it sounds like a pain in the arse.

Adam

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# 3 26-08-2005 , 05:25 AM

Inspector Lee
Join Date: Feb 2005

Location: San Francisco

Posts: 22

Thanks for the reply. I actually ended up just using Blobby surfaces (since they render in a softare render) and they look great. I don't know much MEL scripting, I guess that's what I need to tackle next.

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# 4 26-08-2005 , 05:32 AM

Registered User
Join Date: Dec 2004

Location: Melbourne, Australia

Posts: 36

From what I found on mel scripting as much as it is annoying especially when you busy modelling and making things look awesome it does on many occasions save much in the stuffing around department as well as the customization factor.

Anyway mate have a good one!

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# 5 26-09-2005 , 07:58 PM

Registered User
Join Date: Sep 2002

Location: Minnesota, USA

Posts: 3,709

Sorry I missed this one as well, but I was going to suggest ising the bubble PaintFX brush on your props, as they render SUPER fast, in software also, and they are multi-size by default.

Glad you got it working tho!

Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS
izzylong.com

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