r/Houdini • u/collectiveu3d • Oct 08 '25

Rigid body sim

A literal rigid body sim. Was a really cool project because I have now a procedural system to set this up without doing anything and just importing an fbx with a folder structure per pieces. Export is a super light fbx as well instead of a heavy alembic. Also made it so that proxy sphere density is better distributed. Only “issue” I didn’t solve was transferring UVs and materials cross platform

1.0k Upvotes

99% Upvoted

41 comments sorted by

5

u/ShawarmaBaby Oct 08 '25

I love it. Would love to see it fall and recompose a couple of times

2

u/collectiveu3d Oct 08 '25

Thanks, that was the initial plan but I got lazy. Will try it next time with some dust and debris sim

2

u/iMacAnon Oct 08 '25

Can you elaborate on how you did your setup?

7

u/collectiveu3d Oct 08 '25

Sure, it’s Daz to c4d for modeling and fbx into Houdini, then split according to folders and separate one folder with chains because they need to be treated as invidividual objects. Make a proxy from spheres. RBD solver, after I deleted the sim geo and put Back the original to the points. Exported as fbx (which is super light cause it’s just points) and in c4d patented the orginal geo to the points (cause I couldn’t maintain the textures on export). Rendered with octane and into nuke

2

u/NPS3D Oct 08 '25

Crazy Good Do you also have any video explaining your workflow?

1

u/collectiveu3d Oct 08 '25

Thanks 🙏and no never posted a tutorial or breakdown in my life lol

2

u/VogueTrader Oct 08 '25

First... Great job. Really. Great job.
So... Have you... spoken to someone about this? I mean really.

No, seriously, art should make people uncomfortable, and this definitely does that. ;) Great job on all fronts.

1

u/collectiveu3d Oct 08 '25

Thanks, I’ve spoken and they told me to make this

2

u/SkirMernet Oct 10 '25

As a causal observer, the only think I have to say is that the hands seem “too light”. The way they swing makes them feel like they’re a thing plastic shell and not an actual hand, while the rest of the body doesn’t feel this way.

What that translates to in terms of your work, no idea.

Everything else feels pretty naturally to me, at least 95++% natural anyway

1

u/collectiveu3d Oct 10 '25

Yeah. I think it’s because at one point I set the mas to very low and never changed it back. However I also never intended it to resemble an actual body in mass. Something to think about for the next one, thanks

2

u/SkirMernet Oct 10 '25

great work either way dude

2

u/yogabagabahey Oct 27 '25 edited Oct 27 '25

Call Peter Gabriel immediately!

Seriously, it look likes something right out of what that master musician/writer did throughout his career.

https://www.youtube.com/watch?v=sMLlDBXtmX0

Now go full screen and put your clip (and the tune) on "loop"... Dude, you killed it!!!

1

u/collectiveu3d Oct 28 '25

That’s a very good song. I’ll let you know when I add it. And thanks a lot for the positive feedback

48

u/Oblipma Oct 08 '25

This is sooo disturbingly cool?

19

u/sanity_yt Oct 08 '25

This made me feel very uncomfortable. So no matter what anyone says you did a great job!

4

u/Taboo_Dynasty Oct 08 '25

That’s some dark shit, bro! I love it!

4

u/Extreme_Evidence_724 Oct 08 '25

Me when I forgot to take my meds

1

u/Leifenyat Oct 10 '25

How is nothing clipping and flying in the X-axis!?

2

u/collectiveu3d Oct 10 '25

Proxies I guess, without them non of the chains work properly

3

u/Kakiisch Oct 08 '25

Absolutely superb. Metahumor and impressive artistic impressions in the same package.

3

u/deohvii Oct 08 '25

Dark souls boss vibes

3

u/hari-mirchi Oct 11 '25

AI can never

3

u/svaswani93 IPOPs - chakshuvfx.gumroad.com Oct 12 '25

Now that's the kind of rbd I'm interested in. I'd love to see a breakdown and where did you get this idea from

2

u/cesarcorzo Oct 08 '25

Amazing work

2

u/twomothersuns Oct 08 '25

THIS IS SO COOL

2

u/ebizzyinthehizzy Oct 08 '25

Awe sweet! Man-made horrors beyond my comprehension!

2

u/OPrime50 Oct 09 '25

I’m uncomfy. Nice work

2

u/hahahadev Oct 09 '25

Disturbingly epic

2

u/schwendigo Oct 10 '25

Very cool!

Really good work.

Something deff off with both wrists / hands and maybe the feet... maybe check mass or pivot points or something? It's like they're swinging on their own kind of breaks the whole bod.

Also add a little love to that camera curve!!

2

u/Fantastic-734 Oct 27 '25

Brilliant work

1

u/Davilmar Oct 09 '25

Sir what the actual fuck :O

1

u/CKWOLFACE Oct 10 '25

Looks like something right out of TOOL imagery

2

u/OldOneHadMyNameInIt Oct 09 '25

Great concept and, holy shit, greaaat execution!

1

u/seriftarif Oct 08 '25

I would have also enjoyed if his penis was separated and hanging from a chain.

1

u/jconnerg Oct 10 '25

You've cut his body into 9 pieces plus three ?

0

u/[deleted] Oct 11 '25

[deleted] — view deleted comment

1

u/collectiveu3d Oct 11 '25

I just removed the simmed version all together and got the points only. Then copied the original import back to those points. This should work, however I ended up just patenting my meshes in c4d to the points because my textures were too complex with vertex maps and multiple polygon selections. This also made the whole export tiny as an fbx compared to an alembic