Photogrammetry 1 | Photos and colors

In the next couple of posts I will be describing photogrammetry workflow which I am creating for a student production. I am planning to describe here the whole process, from processing pictures to exporting game-ready assets. Game-ready assets because our production requires realtime renderings, but the process can be easily altered to produce VFX-ready assets (but this will probably require more manual work e.g. retopo, UVs to meet stricter quality requirements).

I have a tight schedule for this project, so I will try to stay simple, efficient, but try to be as correct as possible.

In this post I will describe our photos processing setup and colors workflow. This will result in photos with mask in alpha channel and in linear color space, ACES in our case. After that the photos should be ready for photogrammetry software, but that is for another post 🙂

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Photogrammetry 1 | Photos and colors

Nuke tip | Batch conversion of raw images with dcraw

I recently started to help out with photogrammetry pipeline for a student project. I would like to do artist-friendly yet accurate and proper workflow. It should be as automatic as possible. But that I will describe more in depth in other blog posts.

One of the first steps of our workflow is to process raw images (Canon’s .CR2 in our case) into something Nuke can handle well. In this quick tip I will show you a simple tool I adapted for this purpose and how you can use it directly from Nuke.

screen_nuke

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Nuke tip | Batch conversion of raw images with dcraw

Nuke tip | Setting up NumPy on Windows

Sometimes it is useful to have NumPy module available in Nuke’s Python. It contains powerful tools for image processing and is required by some gizmos, e.g. mmColorTarget.

Setting up NumPy on Linux is usually just a matter of running “$ pip install numpy”, but on Windows it can get tricky.

In this quick tip I will show you how to easily take advantage of Houdini’s NumPy which was compiled with the same compiler as Python in Nuke.

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Nuke tip | Setting up NumPy on Windows

Houdini tip | Assets versioning workflow

In this post I will discuss couple of ideas about versioning of Houdini assets.

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Keeping track of your changes is important in every workflow and the same applies to dealing with digital assets in Houdini (HDA/OTL). Houdini enables you to have non-destructive workflows and has a nice way of managing its assets versions.

I think that those useful features might be a bit hidden, so I thought I could write something about it 🙂

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Houdini tip | Assets versioning workflow

Debugging Python in VFX applications

In this guide I will show you how you can debug Python scripts in various VFX DCC applications, like Houdini, Nuke, Maya and Blender. I will cover remote Python debugging from Visual Studio Code and configuration of applications.

debug_screen

UPDATE 1: added new image :), fixed typo in pip command, mentioned other ways of pointing to ptvsd module, compared VSCode debugging to pdb.

UPDATE 2: mentioned Motion Builder and other packages

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Debugging Python in VFX applications

Learning resources about VFX and CG

I would like to share with you a collection of presentations, research papers and theses on various topics of VFX or CG.

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I am used to collecting good learning resources and keeping them around in case I will need them later. So it happened that my small list grew and I realized that I have quite interesting things collected from various places.

So I decided to create a repository at GitHub where I will continue to gather useful information which I come across. I am not trying to re-create a database of all recent cutting-edge research. It is more oriented on resources which are easier to understand, like presentations with notes and pictures 🙂 I have been most interested in resources about FX and volumetrics, so it is missing stuff in other areas like cloth simulation etc..

And this is also one of the motivations to host it on a git: similar-minded people can contribute with their areas of interest and hopefully we will end up with a nice pool of information which we can quickly refer to when needed.

I tried to make an easy system for adding new entries – simply add them into a json library file and the page will be automatically updated. More info about that in the repo.

I hope that you will find this resource useful 🙂

Learning resources about VFX and CG

Houdini tip | Houdini Python modules documentation

Hello,
in this post I will present you a small project I did recently. If you have spent a lot of time digging in Houdini undocumented Python modules, then this might save you some time.

docs_screen

UPDATE: Now there are more modules documented and I changed my workflow, see notes in repo.

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Houdini tip | Houdini Python modules documentation