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MOPs @motionoperators.com · 20/05/2026

The MOPs course at Houdini.School is now available to you on YouTube! This is a complete course on the open source version of MOPs, explaining how the system works, practical use cases, and the math behind it all. 1: youtu.be/g9eSle9IVjU?... 2: youtu.be/J2g0v1k6MBs?... 3: youtu.be/q_aD6sza6gA?...

youtu.be

MOPs: Motion Operators for Houdini Part 1

YouTube video by Houdini.School

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MOPs @motionoperators.com · 17/04/2026

The MOPs tool for orienting curves using parallel transport is eight years old now, and mostly made obsolete by Houdini's native tool for it, but I wanted to revisit our old implementation and improve it a bit anyways. I documented how it works here: www.toadstorm.com/blog/?p=1168

Revisiting Parallel Transport – Toadstorm Nerdblog

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MOPs @motionoperators.com · 25/02/2026

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...

youtube.com

LIVE: Ep 465 Special Guest Henry Foster, AKA Toadstorm!

YouTube video by Mograph

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MOPs @motionoperators.com · 04/02/2026

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...

Release MOPs v1.11 · 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 ...

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MOPs @motionoperators.com · 29/01/2026

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...

houdini.school

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...

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MOPs @motionoperators.com · 25/11/2025

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/

Want even more MOPs? MOPs Plus adds tools for typography, dynamics, cameras and more!

MOPs Plus – MOPs

MOPs @motionoperators.com · 24/10/2025

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...

Introducing MOPsCam – MOPs Blog

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MOPs @motionoperators.com · 02/09/2025

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...

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MOPs @motionoperators.com · 26/08/2025

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!

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MOPs @motionoperators.com · 05/08/2025

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

A VFX Artist’s guide to the System Environment – Toadstorm Nerdblog

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MOPs @motionoperators.com · 21/05/2025

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

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MOPs @motionoperators.com · 21/04/2025

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.

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Reposted by MOPs

Everything Procedural Conference @everythingproc.bsky.social · 07/04/2025

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

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MOPs @motionoperators.com · 25/03/2025

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

A Houdini RBD Primer, Part 1 – Toadstorm Nerdblog

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MOPs @motionoperators.com · 11/03/2025

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...

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MOPs @motionoperators.com · 19/02/2025

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...

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

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MOPs @motionoperators.com · 14/01/2025

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

MOPs+ Collision Geo 1.1 – MOPs Blog

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MOPs @motionoperators.com · 12/01/2025

I've updated the MOPs blog page to use a new Wordpress format so it's easier to post about updates and development in general, and so people can use RSS to get updates instead of social media. The updated page is here: motionoperators.com/blog/

MOPs Blog – The less scary part of Houdini since 2018.

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MOPs @motionoperators.com · 27/11/2024

🚨 Black Friday sale! Today through 12/1, get a MOPs Plus license for 20% off using the coupon code MOPSFRIDAY2024.

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MOPs @motionoperators.com · 23/11/2024

i know this is a business account or whatever but i just baked some really good bagels and you can't stop me from posting them

18 incredibly good-looking everything bagels cooling on racks

a close-up of the sexiest bagels you've ever seen

one sliced bagel dressed with cream cheese and smoked salmon and a few thin red onion slices. i am going to eat myself sick

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Reposted by MOPs

Matt Estela - cgwiki @cgwiki.bsky.social · 21/11/2024

Little Apex explainer targeted at experienced Houdini folk. It's rough (got a cold, ugh), but figured it'll be useful to people like me who were simultaneously interested and apprehensive. Will likely re-record later when my voice recovers and I learn more things... www.youtube.com/watch?v=U9-e...

youtube.com

apex overview

YouTube video by matt estela

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MOPs @motionoperators.com · 24/10/2024

A new build of MOPs Plus is now available! This introduces Infection Falloff 1.1, with a better interface and support for "healing" and reinfection, some improvements to MOPs Typography and Apply Attributes, and more! Details on the changelog: www.motionoperators.com/changelog/

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MOPs @motionoperators.com · 23/10/2024

A new Stable release of MOPs is now available! Lots of bugfixes, nitpicks, UI improvements, and a unit testing module for developers. Details on the Release page: github.com/toadstorm/MO...

Release MOPs v1.10.0 · toadstorm/MOPS

A new Stable release! This includes all Experimental changes between 2023-12-14 and now. Highlights include: Added official unit tests for developers! (please contribute T___T) Fixed a broken chan...

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MOPs @motionoperators.com · 23/09/2024

The Houdini HIVE Horizon talks from Toronto are now available online, including my talk about MOPs and UX in Houdini! Check them out here: www.sidefx.com/houdini-hive...

sidefx.com

HIVE Horizon 2024 | SideFX

HIVE Horizon 2024

MOPs @motionoperators.com · 17/09/2024

Trying to solve an age-old Houdini problem here. Whenever it's done, I'll release the full toolkit for creating self-installing Houdini packages as open source software. Doing my best to keep making Houdini easier!

A typical installer dialog box depicting the automated installation of a Houdini package

MOPs @motionoperators.com · 22/08/2024

I'm going to be presenting at Houdini HIVE in Toronto next month! Hope to see some of you nerds there... www.sidefx.com/houdini-hive...

MOPs @motionoperators.com · 30/07/2024

Hi MOPs+ Users, I know times are tough for motion designers right now, and every subscription you need for your job can start to add up. To that end I'm applying a 15% discount to all active MOPs+ personal license renewals, effective immediately...

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MOPs @motionoperators.com · 15/07/2024

A new Experimental release of MOPs (1.9.2e) is now available. This fixes a number of minor UX errors and an issue with the MOPs Noise Modifier. Details on the release page: github.com/toadstorm/MO...

Release MOPs v1.9.2 Experimental · toadstorm/MOPS

Updated the group mask channel link in MOPs Plain Falloff. Fixed another group mask dropdown in MOPs Pivot. The MOPs Instancer should no longer accidentally generate duplicate id attributes from me...

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MOPs @motionoperators.com · 10/07/2024

A new release of MOPs Plus is now available! This adds compatibility with Houdini 20.5 (Python 3.11) and a number of bugfixes and improvements. Details on the release page: www.motionoperators.com/changelog/

MOPs+ Changelog – MOPs

MOPs @motionoperators.com · 24/05/2024

Here's a little post I made about how to drive rigid bodies in Houdini with handmade animation, using constraints (and MOPs): www.toadstorm.com/blog/?p=1090

Animating RBDs by Hand – Toadstorm Nerdblog

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MOPs @motionoperators.com · 29/04/2024

A new release of MOPs Plus is now available! This adds MOPs Rig Delay, propagation options to MOPs Rig Spring for better secondary motion, and some improvements to MOPs Velocity Field and MOPs Apply Attributes DOP. Full changelog here: www.motionoperators.com/changelog/

MOPs @motionoperators.com · 28/04/2024

MOPs+ Changelog – MOPs

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A new Experimental release of MOPs is now available! This adds some improvements to Apply Attributes, fixes for MOPs Randomize, and some QoL improvements related to Falloffs and the Spring and Delay modifiers. Details on the release page: github.com/toadstorm/MO...

Release MOPs v1.9.1 Experimental · toadstorm/MOPS

Updated MOPs Apply Attributes to fix transform blending errors when in world space "Set" mode. MOPs Apply Attributes no longer double-scales KineFX transforms. MOPs Delay and MOPs Spring now auto-c...

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MOPs @motionoperators.com · 01/03/2024

A new release of MOPs Plus is now available! This improves Rig Resample, adds new features to Velocity Field and Camera Blender, and most importantly, adds the Font Browser to MOPs Typography! Details on the release page: www.motionoperators.com/changelog/

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MOPs @motionoperators.com · 29/02/2024

Here's a blog post about simulations in #houdini and why they don't quite behave the same way as the SOP context we all know and love. Hope it helps! www.toadstorm.com/blog/?p=1046

DOPs are not SOPs – Toadstorm Nerdblog

MOPs @motionoperators.com · 09/02/2024

Here's an early prototype of a font selector for MOPs Typography...

An image displaying a scrolling list of fonts displayed with their own typefaces in Houdini

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MOPs @motionoperators.com · 07/01/2024

A new release of MOPs Plus is now available! This adds a number of improvements and bugfixes to several nodes, and a new Vellum example file. Details on the changelog: www.motionoperators.com/changelog/

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MOPs @motionoperators.com · 24/11/2023

If you're having trouble using the coupon: make sure to expand the order summary and select Add Discount to see the coupon option!

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MOPs @motionoperators.com · 24/11/2023

This weekend only, use the coupon code MOPSFRIDAY2023 to get a one-time 20% discount off a MOPs Plus Indie or FX license! Limit 1 per customer. www.motionoperators.com/mops_plus/da...

MOPs @motionoperators.com · 10/11/2023

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Today's MOPs Plus update adds full compatibility for Houdini 20 and Python 3.10. View the full changelog here: www.motionoperators.com/changelog/

MOPs @motionoperators.com · 08/11/2023

MOPs+ Changelog – MOPs

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Congrats to SideFX for the Houdini 20 release! If you are a MOPs Plus user, keep in mind that Plus is not yet compatible with Python 3.10. If you need to use Plus with H20 before the next Plus update, look for a Python 3.9 build of H20.

MOPs @motionoperators.com · 11/10/2023

A new release of MOPs Plus is now available! This fixes a few bugs in MOPs Apply Attributes DOP and adds a "Crosshair" mode to MOPs Camera Blender. Details on the changelog page: www.motionoperators.com/changelog/

MOPs @motionoperators.com · 07/10/2023

A new Experimental release of MOPs is now available! This adds the ability to add new points mid-simulation to MOPs Delay and Spring and improves MOPs Visualize Frame. Full details in the release page: github.com/toadstorm/MO...