CGTalk - Render particles at high fps

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Knut

01-29-2003, 12:57 PM

Hello

I have a scene with a couple of pArrays. They are making a nice shower of coins (instanced geometry). Their motion is perfect. The thing i now would like to do is to render with 75 fps instead of PAL(25 fps). I want to do this to make them move very slow, but with the same motion. What i tried to do was just changing the fps in the time configuration panel. This made the particles speeding away at very high speed (As if someone altered the speed paremeter). What is the right procedure to make my particles move slower, but not altering their trajectory?

Thanks for looking at my problem

Knut

lowkey

01-29-2003, 03:41 PM

well, i never tried this myself, but did you think of reducing the framerate instead of raising it? if you set your fps to 75, it's mere logic to see that the particles' motion speeds up about 3 times, compared to 25fps. :shrug:

another way would be applying 'slomo' in post!

EDIT:
damn, i thought this was the MAYA forum. :rolleyes:
anyway, haaaaaiiiil thee MAYA !!! :D

Knut

01-29-2003, 06:21 PM

:scream:

Doing it in post does not solve my problem. It gets choppy or blurry when doing it in AFX.

knut

phoenix2k

01-29-2003, 06:55 PM

do the whole animation in more frames (1000 instead of 100) with a higher frame speed...

3dsmax5

01-29-2003, 09:46 PM

right click on the play button, to access the Time Configuration. change the framerate to custom and enter the desired fps. Then render out as image sequence and compile them to a 25 fps clip in afx.
I did a test with a spray particle system... I think it should work with PArray too.

Knut

01-29-2003, 10:18 PM

Maybe my brain was out to lunch when i had this problem, i'll test some more tomorrow. But i have a feeling that you cannot "subdivide" the framerate without altering the particles.

Knut

01-30-2003, 10:17 AM

From the discreet support forum.

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Topic: How do i render a particle system at high fps? (5 of 5), Read 11 times
Conf: 3ds max 5 specific
From: John Manning
Date: Wednesday, January 29, 2003 09:02 PM

Try this in Video Post, It works perfectly.

Create a scene event (camera) and an output event. On the scene event setup dialog, uncheck both "lock to VP range" and "lock range bar to scene range". Click OK, and now drag the right side of the range bar far past the end of the output range bar. Now render in super slow motion!

-john
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This is gold! Guess it will work for any anymation that you want to slow down.

mouj

01-30-2003, 10:31 AM

Howdy !

ignore me if i'm wrong (or just tell me !), but couldn't you just slow the particles motion by tweaking emission speed/birthrate or so ?

mouj

Knut

01-30-2003, 10:35 AM

Yes, you could, but the you would not get the exact same motion (gravity and other forces would get a greater influence etc.). It would also be difficult to get the SlowMo feel when manually tweaking. Now it looks like high quality filming with a SlowMo camera. Sweet.

Erka2

01-30-2003, 11:55 AM

Try to render your motion using BulletTime script, it can help...

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