feat(data-exporter): add Houdini daily practice day 211

Author: leviathanbadger

data-exporter/houdini-daily-practice/0211-mardini-2025-bioshock-rust-intro.yaml

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+id: 211
+name: Mardini 2025 - Bioshock Rust Intro
+description: Entry into the Mardini 2025 challenge for March 19
+date: 2025-03-19
+previous: 210
+next: 212
+thumbnails:
+  - /assets/images/houdini-daily-practice/211/thumbnail-0.png
+  - /assets/images/houdini-daily-practice/211/thumbnail-1.png
+  - /assets/images/houdini-daily-practice/211/thumbnail-2.png
+  - /assets/images/houdini-daily-practice/211/thumbnail-3.png
+assets:
+  - type: video
+    src: https://www.youtube.com/embed/W4Xma3DyQCk
+  - type: image
+    src: /assets/images/houdini-daily-practice/211/render-0.png
+  - type: image
+    src: /assets/images/houdini-daily-practice/211/render-1.png
+  - type: image
+    src: /assets/images/houdini-daily-practice/211/render-2.png
+  - type: image
+    src: /assets/images/houdini-daily-practice/211/render-3.png
+tags:
+  - sops
+  - uvs
+  - cops
+  - copernicus
+  - lops
+  - karma
+  - solaris
+  - materialx
+  - reference
+  - animation
+  - after-effects
+  - mardini
+  - mardini-2025
+referenceAssets:
+  - type: video
+    src: https://www.youtube.com/embed/8RNPV09BIzw
+links:
+  - name: Mardini 2025
+    href: https://www.sidefx.com/community-main-menu/contests-jams/mardini-2025/
+pathToBody: houdini-daily-practice/bodies/0211-mardini-2025-bioshock-rust-intro.md

data-exporter/houdini-daily-practice/bodies/0211-mardini-2025-bioshock-rust-intro.md

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+### Mardini 2025 - Bioshock Rust Intro
+
+Today is day 19 of [Mardini 2025][mardini-2025]. The prompt for today is "CRAWL",
+in the KineFX category.
+
+I've wanted to do this project for a long time, but every time I thought about it
+in the past I wasn't sure where to start. Truthfully, The result is still not
+what I'd hoped, but realistically I only spent seven hours on this, and something like
+this is going to take a lot of back and forth. It's not exactly simple making layered
+materials like this - paint, fading and peeling off; then iron, corroding and rusting.
+Elsewhere: gold corroding and tarnishing. I didn't get the animations correct,
+but for the time I spent on it I'm very pleased with the result.
+
+Besides material blending and animation speed issues, I also didn't have time to add
+the ripping cloth sim over the subtitle, or to add many of the finer details of lighting
+that are evident in the reference video. But I had so much fun with this, I will
+definitely be coming back to it at some point in the future to improve on this project.
+
+New stuff:
+
+  - Material blending in Copernicus. I've technically done this to a small extent for
+    the rusted pipe for [practice day 204][day-204], but this is orders of magnitude
+    more complicated than that, including a stable procedural decay over time, and
+    blending between several different materials instead of just two.
+  - Radial and concentric ramps for specifying the paint color. In itself this isn't
+    complex, but I also had to apply it to the base color map in physical space, not
+    texture space, which adds a huge degree of complexity since the painted areas'
+    UV coordinates are procedurally generated. They are likely to be rotated and
+    scaled differently, so I couldn't just shim the ramp in the correct location for
+    UV space.
+
+My entry post is [here][entry-post].
+
+[mardini-2025]: https://www.sidefx.com/community-main-menu/contests-jams/mardini-2025/
+[day-204]: https://brandonslade.me/houdini-practice/204
+[entry-post]: https://www.sidefx.com/forum/topic/100200/?page=1#post-440934