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osmanertasdiken

Houdini engine smoke

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Hi everyone!

I'm trying to simulate a smokey effect for an engine. Here is the kind of look that i'm going for.

 

And this is the look I have so far;

5c14038fefd1a_ScreenShot2018-12-14at19_14_38.thumb.png.06600fc84d4488f5d7b1fa5b8b78924f.png

My main problem is about creating the windy smoke that is coming from the engine.  How can I achieve that look? I've also attached my .hip file.

I have been playing around with it for so long that I can't even tell where to start fixing things..

Any help is highly appreciated!

 

 

Engine_ODForce.hipnc

Edited by osmanertasdiken

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you could do a simple particle simulation and then rasterize them to get the volume. then control density based on age of your points.

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On 14.12.2018 at 8:32 PM, Jesper Rahlff said:

you could do a simple particle simulation and then rasterize them to get the volume. then control density based on age of your points.

Thank you so much for your help! Haven't seen it earlier so sorry for late reply. I did rasterize the particle simulation I created. But it has a lack of detail on the smoke and also I have some sort of Pscale problem that I don't know how to fix...

 5c2262c9e6b36_ScreenShot2018-12-25at14_00_53.thumb.png.c0855d05cd0d2de183117e1a1ba721fc.png

As you can see here beginning of it has more detail then at the end it's extremely blurry.

Also when I put the voxel size down this is how it looks like;5c22635c18d85_ScreenShot2018-12-25at16_59_14.thumb.png.a6113f8f7c374616dfe600d4aeca4f19.png

How can I add detail and get a higher resolution sim?

OdForceVolumeQuality.hipnc

Edited by osmanertasdiken
Uploaded hip file

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On 30.12.2018 at 9:14 PM, Jesper Rahlff said:

attached is a simple example of how I would set it up to get ultimate control over resolution of your volume without having to sim a billion points.

 

OdForceVolumeQuality_suggestion.hipnc

You, sir, are amazing, this is really helpful thanks a lot!

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22 hours ago, osmanertasdiken said:

You, sir, are amazing, this is really helpful thanks a lot!

you are welcome. let me know if anything is unclear

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Hi,1 I'm back here with 2 questions.

Firstly I'm having trouble re-shaping the P points, it works only if my particles are at 0. I want them to get smaller as it goes like a jet engine would, not going straight. How can i achieve that look?

This is how it is at the moment;

5c52d92e89f0c_ScreenShot2019-01-31at10_27_50.thumb.png.1b59825b5a05dc63afe0cbe1753e3cfd.png

Secondly, I'm not sure how to get a stronger velocity blur, this is what I'm after motion blur vise;

5c52d9c6bcd38_ScreenShot2018-12-31at19_30_19.thumb.png.8da6954d64418b93df41d1397b6f18b7.png

I've also attached a hip file to explain it bit further.

Any help would be greatly appreciated,

Thanks,

Osmaner.

ODFORCE_QUESTION.hipnc

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It is easier to work with your circle at 0,0,0. You can move those transforms to the end of the chain and still achieve the same look. Use a PopAttract to cause the particles to collapse towards the center.

To increase the motion blur, try adding a multiplier to your v@v attribute.

v@v*=10;

thruster.gif

ap_ODFORCE_QUESTION.hipnc

Edited by Atom

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9 hours ago, Atom said:

It is easier to work with your circle at 0,0,0. You can move those transforms to the end of the chain and still achieve the same look. Use a PopAttract to cause the particles to collapse towards the center.

To increase the motion blur, try adding a multiplier to your v@v attribute.


v@v*=10;

thruster.gif

ap_ODFORCE_QUESTION.hipnc

Thank you so much for your help and taking your time for this, sir! The only thing is that on the geometry there will be about 15 of these boosters in different locations, and it would be preferable to simulate them bit different than some others. From this method the only idea I have is that simulating few variances and placing into their location manually, I'm wondering if there would there be a procedural way of doing this? And also I've tried multiplying v but motion blur seems to be still not changing at all, could it be that I'm using lines to create the shape rather than particles?

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