Hi,

I have recently created a set of 70+ HDAs called the IPOPs that aim at creating AOVs, Mattes & features for rendering. IPOPs are operator workflows designed to streamline shaders and AOV development in Houdini. With our toolset, artists can easily standardise their networks and access specially developed nodes for various renderers and presets, increasing efficiency and creativity.

Get the IPOPs here! [chakshuvfx.gumroad.com]

Renders in Karma & Mantra.

1. The Standard Library: Set of HDAs that help artists create quick shaders and AOVs and contain useful Utility Nodes such as Fresnel for Karma (CPU & XPU), Mask Falloffs in Shaders etc. The HDA library is constantly updated with new nodes to assist artists in speeding up their workflow and creating a streamlined system thereby increasing efficiency and creativity.

2. The Geometry AOVs: A set of remade common geometry AOVs for artists to quickly generate AOVs, Mattes & Utility Passes for Compositing.

3. The Particles AOVs: A set of remade useful particle AOVs for artists to quickly generate AOVs, Mattes & Utility Passes for Compositing.

4. The Volumes AOVs: A set of remade volume AOVs for artists to enhance their FX using AOVs, Mattes & Utility Passes for Compositing.

We have a wide range of Bundles available for various workflows & we support both Houdini Apprentice & Houdini Indie! For any enquiries please email support@chakshuvfx.com

I will be posting constant updates and developments here.

IPOPs Master bundle:
1. Houdini Apprentice [chakshuvfx.gumroad.com]
2. Houdini Indie [chakshuvfx.gumroad.com]

IPOPs Geometry AOVs bundle:
1. Houdini Apprentice [chakshuvfx.gumroad.com]
2. Houdini Indie [chakshuvfx.gumroad.com]

IPOPs Particles AOVs bundle:
1. Houdini Apprentice [chakshuvfx.gumroad.com]
2. Houdini Indie [chakshuvfx.gumroad.com]

IPOPs Volumes AOvs bundle:
1. Houdini Apprentice [chakshuvfx.gumroad.com]
2. Houdini Indie [chakshuvfx.gumroad.com]

The Volume AOV Bundle works in Mantra & Karma and has options for Mantra VEX Shaders, Karma VEX Shaders (CPU only), Karma Pyro Material (Karma CPU & XPU).

In this example, we can see the Volume AOVs bundle specifically for Karma Materials. The node is available in shaders and settings can adjusted directly within the material giving users easy access to adjusting AOVs for renders in IPR. The IPOPs Volume AOVs Bundle Maker is a SOP-level tool that gives artists quick access to previewing AOVs in the viewport itself and overrides the material settings using attributes. This allows reusing shaders on multiple objects and generating dynamic AOVs based on the current volume.

The Geometry AOV Bundle works in Mantra & Karma and has options for Mantra VEX Shaders, Karma VEX Shaders (CPU only), Karma Material (Karma CPU & XPU), MaterialX (Karma CPU & XPU).

In this example we can see the Geometry AOVs bundle specifically for Karma Materials, there are similar nodes for VEX Shaders & MaterialX respectively. The node is available in shaders and settings can adjusted directly within the material giving users easy access to adjusting AOVs for renders. The IPOPs Geometry AOVs Bundle Maker is a SOP-level tool that gives artists quick access to previewing AOVs in the viewport itself and overrides the material settings using attributes. This allows reusing shaders on multiple objects and generating dynamic AOVs based on the current geometry.

The Particles AOV Bundle works in Mantra & Karma and has options for Mantra VEX Shaders, Karma VEX Shaders (CPU only), Karma Material (Karma CPU & XPU), MaterialX (Karma CPU & XPU).

In this example we can see how the Particles AOVs Bundle is used specifically in Karma Materials, there are similar nodes available in VEX Shaders & MaterialX. The node is available in shaders and settings can adjusted directly within the material giving users easy access to adjusting AOVs for renders. The IPOPs Particles AOVs Bundle Maker is a SOP level tool that gives artists quick access to previewing AOVs in the viewport itself and overrides the material settings using attributes. This allows reusing shaders on multiple objects and generating dynamic AOVs based on the current particles.

🏃Get the Motion Vector VOP Shader & SOPs for VEX Shaders in Houdini! Generate quick motion vectors on the go for geometry, particles & volumes!

The Motion Vector VOP Shader works in Mantra & Karma CPU and is VEX Based. The Motion Vector VOP can be used to generate quick motion vectors for compositing and has two methods (forward frame method for mantra only and velocity-based method).

Works in Mantra & Karma CPU.

Explore our store for various bundles tailored for Houdini Apprentice & Indie:
https://chakshuvfx.gumroad.com/?section=19cTDrlte2Weq16jS08Juw%3D%3D [chakshuvfx.gumroad.com]

Our VEX Shaders, Karma Material & MaterialX HDAs streamline your workflow by providing presets for AOVs, Mattes, and Utility nodes for Mantra, Karma CPU & XPU. The IPOPs Standard Library includes over 70+ HDAs to enhance your projects.

We are excited to bring you the Mask Falloff VOP Shader & SOPs for VEX Shaders in Houdini! Generate quick masks within shaders instantly 🎨

The Mask Falloff VOP Shader & SOPs work in Mantra & Karma CPU and are VEX Based. It can be used to generate quick masks for shading maps and works similar to the Attribute Transfer SOP but in shaders and is SDF-based!

Our VEX Shaders, Karma Material & MaterialX HDAs streamline your workflow by providing presets for AOVs, Mattes, and Utility nodes for Mantra, Karma CPU & XPU. The IPOPs Standard Library includes over 70+ HDAs to enhance your projects.

Explore our store for various bundles tailored for Houdini Apprentice & Indie:
https://chakshuvfx.gumroad.com/?section=19cTDrlte2Weq16jS08Juw%3D%3D [chakshuvfx.gumroad.com]

Elevate your look development with our powerful Fresnel VOPs for Karma! Discover the magic of Thin Film Fresnel, Fresnel, and XRay VOPs to create stunning materials.

The Fresnel, Thin Film Fresnel & XRay Shader work in Karma Materials as well as MaterialX and render in Karma CPU & XPU. Additionally, there is an Index of Refraction Library preset that gets updated from time to time and can be used within shaders. There are outputs for kr (reflection_light), kt (transmission_light), R (Reflection Vector) & T (Transmission Vector).

The kr (reflection_light), kt (transmission_light), R (Reflection Vector) & T (Transmission Vector) are also available as individual VOPs as part of our Standard Library.

Generate outlines using our Edge Detect VOP! We have also included the Front Face VOP for Karma as part of our Standard Library!

The Edge Detect Shader works in Karma Materials as well as MaterialX and renders in Karma CPU & XPU. Additionally, you can use the Mtlx Front Face VOP from our library to get normals only facing the camera, this helps in shading materials which are transparent and have opacity mixed. there is a VEX version of the HDA available as well for Mantra & Karma.

IPOPs v1.1.1 release for Houdini 20.5!

We have released v1.1.1 with Houdini 20.5 Support!
Key notes & updates:
Houdini 20.5 Support! Available for Houdini 20.5.278 & above
Added Python 3.11.7 Libs for Windows & Linux

Added
Particles AOV: __ageRGB : This AOV ramps across the age value of a particle attribute. There are options to set custom values or use the nage (age/life).
IPOPs Kma Age RGB VOP - 1.00.01
IPOPs Mtlx Age RGB VOP - 1.00.01
IPOPs Vex Age RGB VOP - 1.00.01
IPOPs Mtlx Cellular Noise - 1.00.01
IPOPs Mtlx Cellular Cracks - 1.00.01
IPOPs Mtlx URamp - 1.00.01
IPOPs Mtlx Veins - 1.00.01
IPOPs Mtlx Cavities - 1.00.01
IPOPs Mtlx Burlap Pattern - 1.00.01

Fixed
IPOPs Volume AOVs Bundle Maker - 1.00.55
IPOPs Kma Volume AOV Bundle - 1.01.01
IPOPs Vex Volume AOV Bundle - 1.01.01

Updated
IPOPs IOR_Materials List updated with new IOR values. Added additional materials for glass, plastic, liquid, metals and hard surfaces.
IPOPs Particles AOVs Bundle Maker with __ageRGB settings - 1.01.01
IPOPs Kma Particles AOV Bundle VOP with __ageRGB settings - 1.01.00
IPOPs Mtlx Particles AOV Bundle VOP with __ageRGB settings - 1.02.01
IPOPs Vex Particles AOV Bundle VOP with __ageRGB settings - 1.01.01
IPOPs Particles AOVs Attribs Exporter updated ageRGB settings - 1.01.01
IPOPs Particles Rendervars LOP updated with ageRGB settings - 1.01.01


For queries please email me at sharan@chakshuvfx.com

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Buy On Gumroad: https://chakshuvfx.gumroad.com [chakshuvfx.gumroad.com]
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IPOPs v1.1.6 — One-Click License Migration for Houdini 21

We’re excited to announce IPOPs for Houdini 21 (v1.1.6), bringing a smoother licensing experience with a brand-new License Migrator.

Why This Matters

Moving to a new Houdini version often means resetting your user preference folder — and manually relocating license files can be tedious. With this update, you can carry forward all your IPOPs licenses from older Houdini installs into Houdini 21 with a single click.

Zero internet dependency: The tool works offline by copying your encrypted *.license / .lic files.

Instant migration: Your validation flow remains unchanged, so there’s no need to re-activate.

Cross-platform ready: Windows & Linux Houdini 21 package JSONs are now included.

What’s New in v1.1.6
Added

ipops_licensing/scripts/ipops_license_migrator_client.py

ipops_licensing/packages-json/IPOPs_linux_h21.json

ipops_licensing/packages-json/IPOPs_windows_h21.json

Updated

ipops_activate_license-3.0 now includes a Migrate All IPOPs Licenses action.

How to Use (3 Simple Steps)

Select your old Houdini prefs path
In ipops_activate_license-3.0, point to your previous Houdini home folder (e.g. $HOME/houdini20.5/ or C:\Users\<you>\Documents\houdini20.5).


Click “Migrate All IPOPs Licenses”
The tool copies all valid IPOPs license files into your current $HOUDINI_USER_PREF_DIR.


Done
A summary dialog lists what was copied (and anything missing). Restart Houdini if your setup loads licenses at startup.


What Gets Migrated

All installed IPOPs product licenses (*.license files)

IPOPs_Standard_License.lic

IPOPs_StandardLicenseType.txt

The migrator never alters keys or contacts servers — it simply relocates your existing license files.

Compatibility

Houdini: 21.0

OS: Windows & Linux (H21 packages included)

Backwards-compatible: No changes to activation/validation logic.

Notes

If the old and new user preference folders are the same, migration is skipped automatically.

Missing files are reported in the summary dialog so you can double-check your source path.

Get Started with IPOPs for Houdini 21

Download IPOPs v1.1.6 on Gumroad
and streamline your license migration today.

POPs (Image Plane Operators) + Render Tools Bundle for Houdini Indie

🎯 Why this Bundle?

This all-in-one toolkit gives you 7 powerful HDAs and toolsets designed to make your Houdini workflow faster, cleaner, and more production-ready.
Whether you need perfect motion blur, streamlined AOVs, lightweight camera-aware scenes, or art-directable instances, this bundle covers it all — at a fraction of the cost of buying them individually.

📦 What’s Inside
1. Particles Deformation Blur for Houdini
Stable point counts for cached particles → perfect deformation blur
Eliminate jittery, inconsistent blur and velocity hacks
Works for rain, sparks, embers, sand, and custom FX
Includes example HIP file

2. IPOPs Standard Library
Core operator set for shaders & AOVs
Utility nodes like Fresnel, mask falloffs, and shading presets
Works with Mantra, Karma VEX, Karma Materials, and MaterialX
Constantly updated with new nodes

3. IPOPs Geometry AOVs
Generate quick mattes and passes for comp & shading
Compatible with Karma Materials & VEX Shaders
Step-by-step guide available on blog

4. IPOPs Particles AOVs
Specialized AOV generators for particle FX
Create passes for compositing control & lookdev flexibility
Works in Karma and Mantra

5. IPOPs Volumes AOVs
Fast generation of volume AOVs (smoke, pyro, fog, etc.)
Plug-and-play for Karma CPU/XPU and Mantra VEX

6. Camera Proximity Toolkit
Three black-boxed HDAs to keep your shots light and render-ready:
Calibrator → Camera-driven particle & volume control
Set Culling → Remove out-of-frustum geo & auto-generate VDB proxies
Ocean Plane Generator → Camera-sized ocean grids, adaptive to shot scale

7. Art Direct Your Instances! (Explosion Setup)
Populate shots with multiple explosions/caches
Switch between proxy and render caches
Quick controls for timing, scale, and randomization
Example HIP file included

✅ Compatibility
Houdini Versions: 20.0.729+, 20.5.278+, 21.0.440+
OS: Windows & Linux
Renderers: Mantra, Karma CPU & XPU
Shaders: VEX, Karma Materials, MaterialX
License: Houdini Indie & Apprentice (Studio/FX on request)

🔧 Installation & Access
You’ll receive private GitHub repository access within 24 hours of purchase
Repo is continuously updated — you’ll get new HDAs & fixes automatically
Requires a GitHub account & internet for initial clone/activation

🌟 Why Buy This Bundle?
Future updates included
Trusted by professional FX artists

✨ Grab the IPOPs + Render Tools Bundle today and supercharge your Houdini workflow.