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View Full Version : Particle Baking issue in R10

Troyan
07-24-2007, 05:10 PM
If this project has done anything, it's shown me everything that MIGHT go wrong.

So I've baked my particles and rendered and they all came out nice and continuous across the animation. But when I do a preview in the editor window, the particles are at a different rotation than the rendered sequence. Any thoughts as to why this is happening?

RenderedFrame (http://www.thedanse.com/cgtalk/RenderedBakedFrame.png)

EditorFrame (http://www.thedanse.com/cgtalk/EditorBakedFrame.png)

Notice the rotation of the purple triangular object left frame.
abdelouahabb
07-24-2007, 05:44 PM
hi
perhaps because each frame needs the previous frame like in ST
ccross
07-24-2007, 05:52 PM
Particles and the editor window don't mix very well. Only the exernal renderer will calculate the particles from the beginning of the animation, so the editor window is very unreliable. If you playback the animation from the beginning with playback set to "all frames" it may help.
Troyan
07-24-2007, 05:56 PM
Particles and the editor window don't mix very well. Only the exernal renderer will calculate the particles from the beginning of the animation, so the editor window is very unreliable. If you playback the animation from the beginning with playback set to "all frames" it may help.

Yes, but doesn't baking add a keyframe at each frame for each particle for position, rotation, etc.? At least that's how baking used to work.
ccross
07-24-2007, 05:59 PM
Are you using mograph to do the baking? I'm pretty sure that's the only way to do it in cinema unless you know code. I haven't fooled around with the mograph baking solution. I know for baked cloth if you don't let it play through the entire animation it can skip parts of it.
abdelouahabb
07-24-2007, 06:02 PM
perhaps it depends how playing frames is, you can enable to read "project" or set "15 frames/s" or a number...just an idea, and excuse my bad english.
Troyan
07-24-2007, 06:19 PM
Are you using mograph to do the baking? I'm pretty sure that's the only way to do it in cinema unless you know code. I haven't fooled around with the mograph baking solution. I know for baked cloth if you don't let it play through the entire animation it can skip parts of it.

They're particles from an emitter. Bake particles.
ccross
07-24-2007, 06:27 PM
Oh, sorry, I just assumed you were using thinking particles. I haven't used this method before. But I still bet it has to do with skipping some frames in playback.
Troyan
07-24-2007, 06:31 PM
Oh, sorry, I just assumed you were using thinking particles. I haven't used this method before. But I still bet it has to do with skipping some frames in playback.

I'll give that a shot next, I've never played with the playback/frames settings. However, again, due to the nature of baking, should it not matter? Doesn't baking keyframe everything?

Thanks for the tips :)
ccross
07-24-2007, 06:36 PM
Theoretically I agree with you, it should play back the same way each time. I just know from my experience with baking cloth in Cinema that it wasn't the case. Now the problem I had with the cloth baking may have been a bit different. All the frames would be baked, but the timing would get off if I skipped around very quickly. Hopefully someone with a deeper knowledge of the cinema code will comment.
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