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‎.vscode/settings.json

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‎content/blog/index.md

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---
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title: "Hello Friend"
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pageSubTitle: 'Coming soon'
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sideMenuHeading: 'Houdini (WIP: Coming Soon)'
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date: "2019-01-17"
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coverImage: "./assets/hello.jpg"
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author: "Elliot"
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excerpt: '"Hello, friend?" That''s lame. Maybe I should give you a name...'
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tags: ["rob____ot", "hello friend"]
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parents: ["ue4guide"]
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root: "/blog"
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sortIndex: 0
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---
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> "Hello, friend?" That's lame. Maybe I should give you a name...\
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> But that's a slippery slope.\
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> You're only in my head.\
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> We have to remember that...\
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> Shit.\
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> It's actually happened.\
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> I'm talking to an imaginary person.
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>
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> **— Mr. Robot S01E01**
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# Index

‎content/graphics/cheatsheet.md

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---
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title: Cheatsheet
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pageSubTitle: Annoying shit I always lookup
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sortIndex: 2
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sidebar: graphics
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---
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# Lighting Units (Candela vs Lumens vs Lux)
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# Graphics Cheatsheet
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Shit I annoyingly forget and always have to lookup
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## Lighting Units (Candela vs Lumens vs Lux)
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![](./assets/candela-vs-lumen-vslux.jpg)
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‎content/graphics/gpu-architecture/technical-overview.md

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title: 2019 GPU Architecture Crash Course
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sidebar: graphics
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---
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# 2019 Overview Material
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# 2019 GPU Architecture Crash Course
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[GPU Architectures](../assets/resources/2019_cerrato_gpu_arch_talk.pdf) by Maurizio Cerrato (@speedwago) is a concise but accessible crash course into how GPU hardware works. He even touches on how mobile GPUs differ with Tile Based Deferred Rendering architectures
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‎content/graphics/index.md

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# chickenscratchnotes
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repo for easier sharing of gists/notes

‎content/graphics/light-transport/light-transport.md

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---
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title: Light transport notes
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pageSubTitle: From Subsurface Scattering to Neutron Transport
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sidebar: graphics
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# Light transport notes
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# TLDR
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## TLDR: From Subsurface Scattering to Neutron Transport
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- All rendering is a lie: Specular/Diffuse => approx. of SSS => approx of volume tracing
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‎content/graphics/pbr-crashcourse.md

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title: Physically Based Rendering Crash Course
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sidebar: graphics
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# Physically Based Rendering Crash Course
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# Google Filament Documentation
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A masterclass yet accessible guide of the past 20 years of PBR: <https://google.github.io/filament/Filament.md.html>
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[Google Filament Documentation](https://google.github.io/filament/Filament.md.html)
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- A masterclass yet accessible guide of the past 20 years of PBR

‎content/graphics/volume-rendering/volume-rendering-math.md

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# Physics of Light: Absorption
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[From MIT Lecture Notes: A Classical Model for Spectroscopy](https://ocw.mit.edu/courses/chemistry/5-33-advanced-chemical-experimentation-and-instrumentation-fall-2007/lecture-notes/classicalspec.pdf)

‎content/graphics/volume-rendering/volume-rendering-zoo.md

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# TODO
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‎content/graphics/volume-rendering/volume-rendering.md

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# Overview
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![Jarosz 2008, Radiance Caching For Participating Media](../assets/rte-diagram1.png)

‎content/houdini/dops/techniques/general-tips.md

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# General Tips
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- Division size for simulations 0.05 (5 cm)

‎content/houdini/dops/techniques/upres.md

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# Enable OpenCL
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‎content/houdini/index.md

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title: Houdini
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pageSubTitle: Coming soon
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sideMenuHeading: Houdini
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root: houdini
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parents:
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- houdini
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# Houdini Guide
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A guide and personal notes for using Houdini

‎content/houdini/rendering/mantra.md

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# Mantra
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Understanding Mantra: <https://www.sidefx.com/docs/houdini/render/understanding.html>

‎content/houdini/rendering/redshift.md

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# Compositing Equation
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# Redshift
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## Compositing Equation
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- Beauty = DiffuseFilter_DiffuseLightingRaw + DiffuseFilter_GlobalIlluminationRaw + DiffuseFilter\*SubsurfaceScatteringRaw + SpecularLighting + Reflections + Refractions + Emission + Caustics
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- If using "Caustics Raw" instead of "Caustics", these would have to also be multiplied by "Diffuse Filter".
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- **Add** the Volume Fog Emission AOV to the primary AOV composite.
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- Additive layer that contains only the emission component
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# Volume Rendering
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## Volume Rendering
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- If want to make volume darker but preserve approximate intensity, adjust scatter and absorption coefficients together
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- use the "Scatter Tint" to adjust the overall color of the volume

‎content/houdini/techniques/baking.md

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# Baking
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- Bake Volume: Can bake volume scattering effects from single pointlight onto a set of points

‎content/houdini/techniques/detangle.md

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# Detangling wires
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‎content/houdini/techniques/geo-deformation.md

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# Geo Deformation
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# Deform by point
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## Deform by point
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- BlendPose Chop
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- ClothCapture

‎content/houdini/techniques/pyroclastic-noise.md

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# Pyroclastic Noise
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<https://forums.odforce.net/topic/12923-pyroclastic-noise-demystified/>

‎content/houdini/techniques/tutorials-from-others.md

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title: Cheatsheet
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# Houdini Tutorials From Others
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# ODForce Tutorials
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## ODForce Tutorials
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Compiled by [Atom on odforce: https://forums.odforce.net/topic/25173-atoms-link-page](https://forums.odforce.net/topic/25173-atoms-link-page)
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‎content/houdini/techniques/visualize-debugging.md

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# Debug Visualization
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# Volumes
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## Volumes
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- General Visualize Node: Another way to vizualize volume slices
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- Can show text

‎content/houdini/vellum/overview.md

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# Overview
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# Vellum Overview
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- Position Based Dynamics solver
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- 3 Nodes: Vellum Constraint + Solver + PostProcess
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- Softbody: Cloth + Struts
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- Balloon: Cloth + Pressure
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# Nodes
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## Nodes
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- Vellum Weld Points: Stitches vertices together and allows you to specify tensile stress
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- Vellum PostProcess: Allows to blur the sim, detangle, remesh, etc

‎content/houdini/vellum/techniques/general-tips.md

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# General
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# General Vellum Tips
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- Add remesher or triangluate into your cloth mesh
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- **Edge Fracture**: to add random pattern of tears
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- **Constraint Iterations:** Higher resolution cloth means you need higher constraint iterations
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## Settings
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- Chiffon/Silk
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- Cloth mesh edge length: 0.01 (remesh to this)

‎content/houdini/vellum/techniques/hair.md

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# Grooming
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# Vellum Hair
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## Grooming
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- FFScatter Node to easily groom/comb fur (and short hair)

‎content/houdini/vellum/techniques/tear-cloth.md

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# Vellum Cloth
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- Edge Fracture: to randomly split cloth geo
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- Vellum Weld: to stitch the new separate geo together

‎content/houdini/vellum/techniques/useful-vellum-nodes.md

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# Vellum Nodes
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# Useful Vellum Nodes
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| Node | Description |
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| ------------- | -------------------------------------------------------------------------------------------- |

‎content/houdini/volumes/overview.md

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# Houdini Volumes
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- Old volumes use legacy volume primitive type

‎content/houdini/volumes/techniques/dense-clouds.md

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# Dense Clouds
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- <https://forums.odforce.net/topic/39475-dense-cloud-shader-wdas-cloud-hype/>

‎content/houdini/volumes/techniques/pyro.md

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# Pyro
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# Redshift Rendering
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## Redshift Rendering
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- Parameters:
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- Scatter => color/diffuse

‎content/houdini/volumes/techniques/realtime-clouds.md

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# Real-time Clouds
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# Channel Lighting
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## Channel Lighting
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- Attempt to bake directional fake lights to generate normals + volume normals
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- <https://realtimevfx.com/t/smoke-lighting-and-texture-re-usability-in-skull-bones/5339>
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## Particle Sampling
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- Render volume texture sheet at various slices
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- Use GPU particles to scatter throughout the volume and sample the animated textures

‎content/houdini/volumes/techniques/useful-volume-nodes.md

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# Useful Volume Nodes
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# Visualization
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## Visualization
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- Visualize
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- Volume Slice

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