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a blog of links related to computer animation and production technology Sponsored by ReelMatters.com
Category: production
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Erik Winquist – The Definitive Weta Digital Guide to IBL hdri capture
www.fxguide.com/fxfeatured/the-definitive-weta-digital-guide-to-ibl
Notes:
- Camera type: full frame with exposure bracketing and an 8mm circular fish eye lens.
- Bracketing: 7 exposures at 2 stops increments.
- Tripod: supporting 120 degrees locked offsets
- Camera angle: should point up 7.5 degrees for better sky or upper dome coverage.
- Camera focus: set and tape locked to manual
- Start shooting looking towards the sun direction with and without the ND3 filter; The other angles will not require the ND3 filter.
- Documenting shooting with a slate (measure distance to slate, day, location, camera info, camera temperature, camera position)
NOTE: The goal is to clean the initial individual brackets before or at merging time as much as possible.
This means:- keeping original shooting metadata
- de-fringing
- removing aberration (through camera lens data or automatically)
- at 32 bit
- in ACEScg (or ACES) wherever possible
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Open source resources for down sampling point cloud meshes
MeshLab
www.heritagedoc.pt/doc/Meshlab_Tutorial_iitd.pdfInstant Meshes
www.blendernation.com/2015/11/16/instant-meshes-a-free-qaud-based-autoretopology-program/github.com/wjakob/instant-meshes
igl.ethz.ch/projects/instant-meshes/
Open3D
www.open3d.org/docs/release/index.html
www.open3d.org/docs/release/tutorial/geometry/pointcloud.htmlPoint Cloud Utils
awesomeopensource.com/project/fwilliams/point-cloud-utilsMathWorks pcdownsample
www.mathworks.com/help/vision/ref/pcdownsample.htmlNot Open Source
Various software
cmacvfx.com/how-to-decimate-lidar-or-photogrammetry/ -
Floating point precision and errors in 3D production
https://blog.demofox.org/2017/11/21/floating-point-precision
https://www.h-schmidt.net/FloatConverter/IEEE754.html
The challenge with precision limits in production is tightly connected to the context of the assets, camera and procedural requirements the render scene needs to support.
For example a far away camera chasing a plane may not reveal issues that the same scene may show with a far away camera’s closeup of a displaced water drop on the plane’s windshield.
This is a rough example, but it helps putting things in perspective.Always best testing for specific patterns or targets within a given setup.
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Plex – an open source Visual Effects, Animation and Games pipeline
www.alexanderrichtertd.com/post/plex-open-source-pipeline
Environments
– OS: Windows | Linux | Mac
– Software: Maya 2020+ | Houdini 15+ | 3ds Max 2020+ | Nuke 12+ | …
– Renderer: Arnold | RenderMan | Mantra | V-Ray | …Project Features
– Visual Effects, Animation & Game production management system
– file & folder management (settings | create | save | load | publish)
– flexible, portable, multi functional project environment
– additional libraries (api | img | user | shot)
– workflow tracking & reporting
– user-pipeline integration
– SSTP (simple | smart | transparent | performant)Pipeline Features
Layered Pipeline
– create a company pipeline
– add a project pipeline
– test and develop in a personal environmentScripts
– desktop app
– save (+ publish) | load | create | render
– get, set and handle data | img | scripts
– template UI (user, report, help, accept, comment, color code)
– setup menu, shelf, toolbar, …Workflows and Charts
– naming conventions
– software pipeline
– folder structure (project & pipeline)Data and Helper
– project (resolution, fps …)
– user (name, task …)
– context (shot, task, comment …)
– environment variables (PROJECT_PATH …)
– additional librariesFeedback & Debug (+ advanced logging)
– inform user about processes
– debug like a king *bow* -
Corza – Procedural Rock/Mountain Shader in Blender
https://www.facebook.com/coreycorza/videos/1017363692395438
https://www.facebook.com/coreycorza/videos/232219838955272
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Weta Digital and SideFX Bringing Houdini to the Cloud with WetaH
www.awn.com/news/weta-digital-and-sidefx-bringing-houdini-cloud
New WetaH collaboration marks leading VFX company’s second move to integrate top commercial and proprietary applications in a single cloud-based service.
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