Author: Moritz

Artistic Quadtrees

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Tutorials
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You might not be aware of the fact that you most likely have been using the algorithm we’re discussing here – at least if you’ve ever worked in 3D. Quadtrees (and their relatives, KD-Trees and Octrees) are used to accelerate point queries (ever used pcfind() or nearpoints() in Houdini?), make rendering faster (ever waited for “building raycast accelerator” to finish?) or to compress images. Also they are mesmerizing to look at.

Quicktip: Visualizing Flight Paths

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Tutorials
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The past decade has seen a wealth of data visualization elements in UI design, movie sets and motion graphics. When it comes to creating these elements you’re left with two approaches: faking it vs. the real thing. In this quicktip we’re doing the real thing when it comes to flight data. We’re taking publicly available airport and route data and model the (usually) invisible lines that connect our world by air travel.

VEX in Houdini: Movie Color Visualisation

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Tutorials
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Quite some time ago I was trying to cook up something like the guys at moviebarcode.com: Some setups that’d deconstruct a given movie into its individual colors in a visually pleasing manner. Recently I thought it was time to try another attempt. Instead of linearly mapping the individual frames’ colors on a 2D plane, this time I wanted to create something that took advantage of 3D space.

VEX in Houdini: Diffusion Limited Aggregation (Plus Rendering in Mantra & Redshift)

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Tutorials
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When we saw Andy Lomas’ “Aggregation” series a few years back we were struck. How could you generate those intricate particle sculptures? The series’ title hinted at one possible solution: Diffusion limited aggregation or DLA. In this tutorial we’ll build a basic DLA setup using VEX and volumes. Also we’ll talk a bit about rendering our result in Mantra and Redshift.

Easy Soap Film Shader

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Tutorials
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By far the most frequent question we received after our minimal surfaces tutorial was “how do you build that bubble shader?”. The wait is over – in this tutorial we’ll go over how to build a plausible soap film shader in Houdini’s Mantra and Octane standalone.