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2. Physarum casts shadows. There are two possible ways to avoid this. Either the distance to the background must be increased (by e.g. filming vertically instead of top-down), or maybe physarum would grow on a blue medium. Having seen the issues other students had with food-coloring, using small amounts of pure pigment or acrylic based paint should be a better option. | 2. Physarum casts shadows. There are two possible ways to avoid this. Either the distance to the background must be increased (by e.g. filming vertically instead of top-down), or maybe physarum would grow on a blue medium. Having seen the issues other students had with food-coloring, using small amounts of pure pigment or acrylic based paint should be a better option. | ||
3. With these test-shots, the resolution was not sufficient to see the finest veins. The original plan was to use 20x40cm plexiglas sheets, but maybe 2x4cm makes more sense. This would also diminish filming times maybe to the point where it makes sense again to just leave LEDs on the whole time. | 3. With these test-shots, the resolution was not sufficient to see the finest veins. The original plan was to use 20x40cm plexiglas sheets, but maybe 2x4cm makes more sense. This would also diminish filming times maybe to the point where it makes sense again to just leave LEDs on the whole time. | ||
== Implementation == | |||
Previous tests have shown, that a medium that had synthetic ultramarine blue pigment in it, inhibited the growth of physarum. As a workaround, the timelapse-medium had a thick layer of blue medium and on top on that approximately a millimeter of normal, clear medium. With that, a test timelapse was shot overnight (about 10 hours of time). The camera used, was a blackmagic pocket cinema camera 4k, which had the unique advantage of the option to be cable-powered without any accessories. The timelapse was shot in BRAW 12:1 and 3840 by 2160 px and the resulting video was 3 minutes and 16 seconds long. | |||
Because oat flakes in the shot would give away the true scale of the image, a bedding of E. coli bacteria was grown and prepared on the plate. The shot was lit by a continuously running LED-Panel with a power of 15w. | |||
Sadly, the specimen of physarum was not very strong and grew only very little during the interval. |
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