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This week, after hearing Sony confirm, then describe, the upcoming PlayStation in development, you may be wondering what exactly "ray tracing" is and why it is so different from others in terms of high performance video game. Here is a surprisingly readable technical demonstration of Digital Foundry – using Minecraft of all things – to emphasize its applications – as your user name casts a shadow.
Minecraft, using the incredible Shadows of Sonic Ether, is a surprisingly good test space. Not only Alex Battaglia and John Linneman of Digital Foundry can create rooms that draw attention to concepts such as "specularity", "indirect lighting" and "differentiated reflective surfaces". This is because the voxelized world is optimal for real-time laser tracing applications.
"So that the whole world is always known [by the CPU] As a block, that's the best thing, "says Battaglia.
"Since these objects do not move and are in a binary, current or deleted situation, it makes calculations easier," adds Linneman.
The rooms they have built show not only those coveted sunrays, indirect lighting, but also the way a room can be indirectly illuminated by multiple reflections of a light source and the way in which the reflections of colored surfaces will mix and change as well. when they bounce off another colored surface. Of course, this is a very technical discussion, but the visual elements are always there to help you illustrate the type of load that the hardware has to support to do it.
"Honestly, it looks like an architectural rendering," Battaglia said at one point.
"It's so that light works in the real world," Linneman says simply. "Many games have a way to simulate this effect, but it is generated in real time."
Battaglia's hardware for this tech demo is more powerful than Xbox One X's. However, with this tracing mod * installed, it runs at 720p and is locked at 30 frames per second – if that gives you an idea of how much this type of rendering requires. Or as a joker comments in YouTube: "2007: But can he use Crysis? 2019: But can he run Minecraft? Oh how times have changed. "
Editor's note: For the sake of precision, but without being too technical, here's how Sonic Ether describes his mod: "It is more descriptive to call technology in [Sonic Ether’s Unbelievable Shadows] "Path tracing", but it's not incorrect to call it "ray tracing" because path tracing is a rendering technique that uses ray tracing. "
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