Sister blog of Physicists of the Caribbean. Shorter, more focused posts specialising in astronomy and data visualisation.

Monday, 21 May 2018

Exploiting the weirdness of data clipping


This one exploits normally annoying rendering artifacts. Blender's realtime display can only show objects from a single side, so for nested transparent spheres you can normally only see their interior or exterior, not both. But by clipping out all the lowest transparency values, part of the other side is revealed. Couple this with a wide-angle lens and changing viewpoint and get quite a lovely mess - a very different effect again compared to the previous straight-line flight.

4 comments:

  1. ... you're on quite a roll here, mister. These I like.

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  2. Mesmerizing! Any chance you might share your Blender scenes? Your visualizations have been quite fascinating and I'd love to get a better view into how you are generating them.

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  3. Samuel Penning This one was based off code I wrote for a paper. That can be downloaded here :
    https://drive.google.com/drive/folders/0B9LcUk_mUmUnSVRNZWN0V2ZSTms
    I'm using these as an excuse to finally learn Python in Blender post-2.5. So things are currently in a messy state - the image textures are generated using code from 2.4, then it's rendered in 2.7... lemme tidy things up and I'll see what I can do.

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  4. Rhys Taylor Fantastic, thank you!

    Adapting to the code changes from the switch in code base from 2.4 to 2.7 is quite an undertaking. It's taken me an eternity just to get my bearings in 2.7x. Switching to the new 2.8 will be another adventure.

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