Particles Sometimes missing from render

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Particles Sometimes missing from render

Postby wetfusion » Wed Feb 01, 2023 8:34 am

wetfusion Wed Feb 01, 2023 8:34 am
missing particles on renders. im just using the native c4d emitter. below are the pics from 3 frames. frame 504, 505 and 506.
happens a few times already on other scenes. no problems on viewport.
c4d version : 2023.1.2
cuda driver version 12.0
OctaneRender Studio+ 2022.1 (12000020)


sci fi loop0504_00000.png
frame 504

sci fi loop0505_00000.png
frame 505

sci fi loop0506_00000.png
frame 506
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Re: Particles Sometimes missing from render

Postby boxfx » Wed Feb 01, 2023 9:57 am

boxfx Wed Feb 01, 2023 9:57 am
Try baking the c4d particle system. I vaguely remember there can be problems because c4d's particles get recycled when the particle dies.

Otherwise you could try replicating what the particles are doing by using a cloner/matrix in mograph. Or maybe use a mograph cloner to clone onto the particles and just render the cloner geometry so octane never has to see the particle data.
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Re: Particles Sometimes missing from render

Postby wetfusion » Wed Feb 01, 2023 10:03 am

wetfusion Wed Feb 01, 2023 10:03 am
here is a simple test
test0262.png
frame 262

test0263.png
263

test0264.png
264


[ Play Quicktime file ] test.mp4 [ 4.05 MiB | Viewed 906 times ]



here is the test scene project https://we.tl/t-DYj0ccknlb
Last edited by wetfusion on Wed Feb 01, 2023 10:15 am, edited 1 time in total.
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Re: Particles Sometimes missing from render

Postby wetfusion » Wed Feb 01, 2023 10:03 am

wetfusion Wed Feb 01, 2023 10:03 am
boxfx wrote:Try baking the c4d particle system. I vaguely remember there can be problems because c4d's particles get recycled when the particle dies.

Otherwise you could try replicating what the particles are doing by using a cloner/matrix in mograph. Or maybe use a mograph cloner to clone onto the particles and just render the cloner geometry so octane never has to see the particle data.


thanks bro. i will try it now :)
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Re: Particles Sometimes missing from render

Postby wetfusion » Wed Feb 01, 2023 10:59 am

wetfusion Wed Feb 01, 2023 10:59 am
i tried as @boxfx suggest.

baking the particle didnt solve the problem.

but putting the emitter as cloner object solve the problem. so its related to how octane reading the emitter particle data?

hope @aoktar can have a look at it and maybe fix it. :D
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Re: Particles Sometimes missing from render

Postby bepeg4d » Thu Feb 02, 2023 7:38 am

bepeg4d Thu Feb 02, 2023 7:38 am
Please always use the C4D Particles Emitter as source for a MoGraph Cloner in Render Instance mode.
In this way, also motion blur is supported:
72D10A6A-1CE1-4E90-ABED-84698A5EB48A.jpeg


ciao,
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Re: Particles Sometimes missing from render

Postby aoktar » Thu Feb 02, 2023 1:37 pm

aoktar Thu Feb 02, 2023 1:37 pm
bepeg4d wrote:Please always use the C4D Particles Emitter as source for a MoGraph Cloner in Render Instance mode.
In this way, also motion blur is supported:
72D10A6A-1CE1-4E90-ABED-84698A5EB48A.jpeg


ciao,
Beppe

Yes as Beppeg say you should use Cloner or particles tab from object tag. Otherwise no stable IDs to track the particles in motion engine.
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Re: Particles Sometimes missing from render

Postby wetfusion » Fri Feb 03, 2023 12:28 pm

wetfusion Fri Feb 03, 2023 12:28 pm
thanks for the reply and advice. for the moment i will use mograph :)
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