Walking papers illusion3/17/2023 ![]() ![]() Here’s a fine example by Benedict Radcliffe from this entertaining collection: The best thing about reality is that it’s real, not photoshopped. I also enjoy photos where reality looks like computer graphics. What’s great is that reality is allowed to get away with artifacts – if this effect was seen in a synthetic image it would come across as unconvincing. The ground shadow look undersampled and banded, like someone was trying to get soft shadows by just adding a bunch of point light sources. Here’s one from photos by Morgan McGuire, from the Seattle public library. I enjoy collecting images of reality that look like they have rendering artifacts. Doubly impressive is that Peter also carefully describes the algorithms used in the process. See more examples on Peter Selinger’s Potrace examples page. In a similar vein, I was highly impressed by the examples created by Potrace, a free, GPL’ed package for deriving Bézier curves from raster images. To whet your appetite, here’s an example from that page, the left side being the original image used to generate the right: With the recent posting on Morphological Antialiasing, Matt Pharr pointed me at this cool Wikipedia page on scaling up pixel art. Speaking of ray tracing, I noticed some GPU-side ray tracers are available for iPhone 3GS from Angisoft: ![]() Note the depth of field and soft shadows: In case you were too busy to actually compile and run this tiny piece of code, here’s the answer, computed in about a minute, sent on to me by Mauricio Vives. So, take it with a grain of salt, but it might be handy in turning up a place or two you might not have found otherwise.Ī few weeks back I passed on a link from Morgan McGuire’s worthwhile Twitter blog (the only good use I’ve seen for Twitter so far) for a business-card sized ray tracer created by Andrew Kensler. But, major developers like Harmonix (in Cambridge) don’t show up. Search on “MA” for State and you get lots of additional hits, mostly mall stores. That said, it’s a bit funky: search by “Massachusetts” and you get a few reasonable hits, plus the Bermuda Triangle. This resource is possibly handy: a map of game studios and educational institutions, searchable by state, city, etc. This book is ShaderX 8, under a new title. Unfortunately for everyone else in the world, CRM retains the rights to the ShaderX name, hence the confusing rename. In short, the ShaderX series has moved publishers, from Charles River Media to A.K. The first one’s not particularly visual, I include it just because the cover and book description was put on the web just a few days ago: Tags: bagel, collision detection, demoscene, fractals, optical illusionĪfter all the heavy lifting Naty’s been doing in covering conferences, I thought I’d make a light posting of fun visual stuff. At the end of the day, you get a pencil and paper to write down who to thank for what.Walk off some pounds by taking a constitutional, visiting a building and a village.The author’s original page describing the various tricks and techniques is gone, but the Way Back Machine has it! One not on the list that I think is great is Heaven Seven, only because of the astounding ray tracing (for the time), and keep in mind that it’s just 64k. After a large meal, put demoscene programs on the TV as ambient video and zone out.Go pick up your other presents: drive a forklift around and contemplate real-time collision detection.After the initial thrill, remember the platonic solids you received last year and worry about the dust that might accumulate on any object with a nearly infinite surface area. Under the CT-scanned tree, find that Aunt Dorothy gave you some real fractals for Christmas.Wake up from a dream about Plato, pixels, and perfect dudes. ![]()
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