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MOPs

@motionoperators.com

Motion Operators, a motion graphics toolkit for Houdini created by Henry Foster (Toadstorm). https://www.motionoperators.com https://linktr.ee/motionoperators

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08.09.2023
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Latest posts by MOPs @motionoperators.com

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LIVE: Ep 465 Special Guest Henry Foster, AKA Toadstorm! YouTube video by Mograph

Matt Milstead from Mograph.com did a little interview with me yesterday where we talked about Houdini, MOPs, and motion graphics in general. Full video is online here: www.youtube.com/live/MsyvhOR...

25.02.2026 21:39 πŸ‘ 10 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Release MOPs v1.11 Β· toadstorm/MOPS New MOPs official release! This release fully supports Houdini 21 / PySide 6. The previous Experimental release also supported Houdini 21 but was confusing for new users. This release includes all ...

A new stable release of MOPs is available! The Experimental build already supported Houdini 21, but this was confusing for new users, so that update (plus some others) are now merged into the main branch. Details here: github.com/toadstorm/MO...

04.02.2026 19:12 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Preview
MOPs: Motion Operators for Houdini This course provides an overview of the MOPs workflow and how it integrates with the rest of Houdini, shows concrete examples of how MOPs can be used in both motion graphics and visual effects workflo...

My MOPs course on Houdini.School is now free! If you want a start to finish course on how (almost) everything works, plus the math background, you can watch it all here: www.houdini.school/courses/mops...

29.01.2026 20:41 πŸ‘ 23 πŸ” 8 πŸ’¬ 0 πŸ“Œ 0
How To Make Music In Houdini in 2 Minutes
How To Make Music In Houdini in 2 Minutes YouTube video by Adam Katz

absolute insanity. a mad genius.
www.youtube.com/watch?v=0IgM...

07.01.2026 22:03 πŸ‘ 11 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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here's mulder and scully sharing a hammock

27.12.2025 01:42 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

we require more cat photos

27.12.2025 01:18 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
MOPs Plus – MOPs Want even more MOPs? MOPs Plus adds tools for typography, dynamics, cameras and more!

MOPs Plus for Houdini node-locked licenses are now 20% off through Monday, December 2nd. Get access to MOPs tools for typography, dynamics, cameras, and more for cheap! Use the coupon code MOPSFRIDAY2025 at checkout to apply the one-time discount. motionoperators.com/info/mopsplus/

25.11.2025 22:57 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Introducing MOPsCam – MOPs Blog

A new MOPs+ release is out! This introduces the MOPs+ Camera, a fully-featured camera rig with all kinds of fun and quick controls for animating cameras easily in the viewport. Check the demo videos and the full release notes here: motionoperators.com/blog/index.p...

24.10.2025 02:00 πŸ‘ 5 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0

was waiting to see if anyone mentioned duke's Far East Suite... it is *extremely* good and rarely noticed for some reason

25.09.2025 00:21 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Eem, Oma's Hideaway, Scotch Lodge, Apizza Scholls, Stammtisch, you could spend weeks eating your way around this city and doing nothing else. Forest Park has hundreds of miles of trails in addition to the Japanese Gardens. The Gorge is beautiful any time of year. It's a great little city.

13.09.2025 23:56 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Good catch, I just patched this and pushed the update to the henry_dev branch.

If you want a quicker fix, change line 18 of MOPs/scripts/python/mops_updater.py to:

from hutil.Qt import QtWidgets

04.09.2025 15:51 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

why do GIFs not work here? 😫do I really have to embed video instead?

01.09.2025 23:32 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Happy Labor Day! I just added Houdini 21 / Qt6 hotfixes for both MOPs and MOPs Plus, and a few cool little upgrades to MOPs... now you can easily cycle falloffs! Check the blog for details: motionoperators.com/blog/index.p...

01.09.2025 23:30 πŸ‘ 11 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

Clarification: Houdini 21 by default uses Qt6 and doesn't have PySide2 compatibility. This will break some tools that use a custom UI. You can get around this by installing a Qt5 build of H21. I'll add Qt6 support soon!

26.08.2025 20:52 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Happy Houdini 21 release day! H21 is compatible with both MOPs and MOPs Plus (for Python 3.11) so you shouldn't have to worry about any upgrades. Have fun!

26.08.2025 17:28 πŸ‘ 6 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
A VFX Artist’s guide to the System Environment – Toadstorm Nerdblog

I wrote a little article here for VFX artists about what environment variables are, how to manipulate them, what various .env files are actually doing, and how to roll your own pipelines to organize your projects at home. Look here: www.toadstorm.com/blog/?p=1010

05.08.2025 02:26 πŸ‘ 13 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

The Conservatory of Flowers is one of the best indoor collections of tropical plants I've ever seen. It's a must-see if you're a plant person.

01.08.2025 19:55 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

sorry i misspoke, i meant boints

21.05.2025 23:07 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

yeah that's software-dependent. maya labels this behavior "segment scale compensate" on joints and is on by default... child bones will be translated by the scaled parent but will apply the inverse scale to themselves to stay the same size.

21.05.2025 23:01 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

controllers are the front-end for interfacing with the skeleton. you'll often have very complicated constraint structures and multiple skeletons driven by the controls that blend their outputs together into the final skeleton that's exported to the game engine.

21.05.2025 22:40 πŸ‘ 11 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

The MOPs website (and toadstorm.com) will be offline for less than 1 hour for some maintenance and improvements. Thanks for your patience!

21.05.2025 17:47 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Release MOPs v1.10.1 Experimental Β· toadstorm/MOPS MOPs Instancer will now pack all inputs except for packed Alembics or disk sequences. This is for consistency so that multi-primitive inputs are correctly grouped together. Fixed a broken channel l...

A new Experimental release of MOPs is now available! This is mostly just minor bugfixes and QoL improvements. Details on the release page: github.com/toadstorm/MO...

13.05.2025 16:45 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I'm looking for software developers who can help me write a floating license server for MOPs+. Some experience in Houdini is a plus but not required. If you're interested or know someone who is, please reach out to me at henry@motionoperators.com.

21.04.2025 18:11 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Apex is still pretty scary and new for most existing Houdini artists, but there’s no need to be scared anymore! Matt (@cgwiki.bsky.social) will provide a jargon-free explainer of Apex at #EPC2025!

Get your tickets now: everythingprocedural.com

#everythingproc #ProcGen #Apex #GameDev

07.04.2025 09:16 πŸ‘ 11 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
A Houdini RBD Primer, Part 1 – Toadstorm Nerdblog

I wrote a little primer on rigid body dynamics in Houdini after seeing a lot of similar questions online. Bullet is a pretty deep rabbit hole to fall into and there's a lot of legacy stuff that's very confusing for new artists... hopefully this helps you get started!
www.toadstorm.com/blog/?p=1123

25.03.2025 00:57 πŸ‘ 31 πŸ” 6 πŸ’¬ 1 πŸ“Œ 0
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A new release of MOPs+ is now available! This adds the new MOPs+ Rig Aim node, as well as a new streamlined version of MOPs+ Collision Geo. More details on the MOPs Blog: motionoperators.com/blog/index.p...

11.03.2025 19:34 πŸ‘ 10 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

Used to freelance as an artist for many years in LA. Get an accountant, especially if any of your income isn't W2. Please DO NOT go to H&R block or similar, they will have absolutely no idea how to prepare taxes for anything that complex (I tried doing exactly that when I first started)

25.02.2025 15:51 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

It absolutely could, although there's existing constraints for that. This is more about gradually bending chains towards a target, for things like tentacles, tails, trees, etc.

19.02.2025 17:05 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
An animation of the Paul test geometry bending to face a target object like some kind of mutated drinking bird toy

An animation of the Paul test geometry bending to face a target object like some kind of mutated drinking bird toy

I'm trying to get another fun new toy done for the next release: MOPs+ Rig Aim. Enjoy watching it wave Paul around!
motionoperators.com/blog/index.p...

19.02.2025 04:37 πŸ‘ 9 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
MOPs+ Collision Geo 1.1 – MOPs Blog

Some info about the upcoming improvements to MOPs+ Collision Geo:
motionoperators.com/blog/index.p...

14.01.2025 23:13 πŸ‘ 6 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0