[Help] Exploding Pumpkin

maxonadmin

Thank you for taking the time to report your issue with this Cineversity tutorial.
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Playback problem. If so, please refer to the FAQ: FAQ: Video's Aren't Working Correctly.
Tutorial workflow problem or clarification.
Version compatibility problem/UI changes.
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Please include a timestamp (where in the video the problem occurs) if applicable.

What are the steps to replicate the problem?
What steps are you taking that seem to cause the problem?
What version of the software are you using?
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If the question is not directly related to the tutorial, please refer to the Q&A forum

andy-dv

when using a spherical field as a mask for the explosion, I'm getting unusual results. When the pieces of exploded cloth approach the edge of the spherical field, they kinda "snap* back toward the center, like it's colliding with the spherical field. I can't get a nice natural fall to the floor.

I've messed with numerous settings including the spherical field size and parameters, my simulation substeps/collision passes...can't seem to fix it.

timestamp ~8min

2024.4.1

Thanks for the great tuts!

Dr. Sassi

Hi andy-dv,

I have not your file here; perhaps then I could be more precise. 9If it doesn't fit into the 1MB size here, please only Dropbox, Google, Apple, Adobe or Wetransfer cloud services. I will not touch anything else, as well not "tiny-URL" stuff. Thanks for understanding.

I do not answer from memory, as things might change from version to version, and I need to see a file before I can say something. Otherwise, it ends up in a guessing game, which I consider a waste of your time and not professional from my side to do.

Please have a look here; it is cached, so if you would like to explore it, clear the cache of the Cloth (Simulation) Tag.
https://stcineversityprod02.blob.core.windows.net/$web/Cineversity_Forum_Support/2024_PROJECTS_DRS/20240627_CV4_2024_drs_24_SIep_01.c4d.zip

I can also see which version you have used in the file and can check it closer to your setup.

Instead, I have tried to reproduce this.
The only time I had something that looked like bouncing back was when the Vertex Tags had the "Use Deformed Point" left checked.

One suggestion: the field option in the Force field is one way. A similar (not identical, as it depends on the setup) way is to mask the field in the Object field.

I hope that helps

All the best

andy-dv

@Dr-Sassi Unchecking "Use Deform Point" fixed the issue. Thanks very much for your assistance

Dr. Sassi

Thank you very much for your reply, andy-dv.

Have a great weekend

principle-ticket

Hello @Dr-Sassi . At about 5:15, when I try to drag the Cloner (containing the arc spline) into the Fields, I'm only presented with "Point Object" or "MoGraph Object". Neither are giving me much luck.

Any suggestions? Thanks! Benjamin C4D 2024.5.1

Dr. Sassi

Hi Benjamin,

Sorry about that. Place a Connect Object as Parent to the Cloner, then Drag the Cloner into the Vertex Map field. This should give you the Spline Option.
I checked this in 2024.5.1 and in 2025 while building the whole setup. ( I avoid answering from memory; as you noticed, things change.)

If you encounter any problems, please let me know, and I'll be happy to look into them.

BTW, the "Use Deformed Points" (Vertex Map), seems to be flipped in 2025.0)

Enjoy

principle-ticket

@Dr-Sassi Amazing. Thanks so much for the update! Right "Use Deform Points" is indeed flipped. Thanks for the confirmation.

Connect object worked for the slice field, but then the slice didn't stick to the sphere as it expanded.

I added a Freeze layer in the Slices Fields which worked well -- but then when I added the Mask to temper the Field Force, anything that went outside the mask recoiled, and headed back towards the center of the pumpkin. Any further advice?

Thanks again, Benjamin C4D2024.5.1

Dr. Sassi

Thank you, principle -ticket.

My best wishes

Dr. Sassi

The current version should work (2025.1.2)
A question came up that didn't used the Help button below the video:
https://cineversity.forums.maxon.net/topic/1645/spline-in-vertex-map-field-does-not-work-for-me

So I checked it. Works here.

Thanks everyone for your patience with this.

Cheers

CINEVERSITY

[Help] Exploding Pumpkin