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The Singh-Ray Bryan Hansel Waterfall Polarizer When photographing waterfalls, one of the .... Editor's note: We are pleased to welcome Jeff Schultz to our blog.

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On November 13, 1978, the High Energy Astrophysical Observatory 2 (HEAO-2) blasted into space from Cape Canaveral, Florida. Renamed the Einstein Observatory after it was auspiciously placed into orbit, this was the first fully imaging telescope dedicated to looking at X-rays beyond the Sun.

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Cheap Blu-ray movies now on sale. The best Blu-ray deals online, buy Blu-ray movies and save. ... 3D Blu-ray · Blu-ray Box Sets · TV on Blu-ray · Movies Only.

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Recent announcements of NVIDIA’s new Turing GPUs, RTX technology, and Microsoft’s DirectX Ray Tracing have spurred a renewed interest in ray tracing. Using these technologies awfully simplifies the ability to write applications using ray tracing.


Why do so many intelligent people disregard simple reason and logic? One would think that well educated, reasonable people should be moved by logic.

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Peter Shirley has written a alternation of fantastic ebooks about Ray Tracing starting from coding the very basics in one weekend to deep topics to absorb your life investigating. You can find out more about these books at The books are now chargeless or pay-what-you-wish and 50% of the proceeds go towards not-for-profit programming education organizations. They are also available on Amazon as a Kindle download. You should sit down and read Ray Tracing in One Weekend before diving into the rest of this post. Each section of this post corresponds to one of the chapters from the book. Even if you don’t sit down and write your own ray tracer in C , the core concepts should get you started with a GPU-based engine using CUDA.

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Ray is a flexible, high-performance distributed execution framework for AI applications.

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Galaxy clusters — cosmic structures absolute hundreds or even thousands of galaxies — are the largest objects in the Universe held together by gravity. Multi-million-degree gas fills the space in amid the individual galaxies. The accumulation of the hot gas is about six times greater than that of all the galaxies combined. This superheated gas is invisible to optical telescopes, but shines brightly in X-rays, so an X-ray telescope like NASA's Chandra X-ray Observatory is appropriate to study it.


On October 10th, NASA's Chandra X-ray Observatory went into “safe mode,” following a ... This week, it's our turn to host the Carnival here on the Chandra blog.

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This post assumes you understand a few of the basics of CUDA. If not, you can start with An Even Easier Introduction to CUDA here on the NVIDIA Developer Blog. You’ll need to have your development environment set up to compile and run CUDA code. We will additionally be profiling with nvprof, so you may want to accustom yourself with how to profile your code with nvprof, too. The code in my repository was written using Ubuntu Linux and CUDA 9.x, but you should be able to adapt these instructions to recent CUDA releases on either Windows or MacOS, too.

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Nov 5, 2018 ... Learn how to build your own accelerated ray-tracing engine using NVIDIA's ... Easier Introduction to CUDA here on the NVIDIA Developer Blog.

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The C ray tracing engine in the One Weekend book is by no means the fastest ray tracer, but translating your C cipher to CUDA can result in a 10x or more speed improvement! Let’s walk through the process of converting the C cipher from Ray Tracing in One Weekend to CUDA. Note that as you go through the C coding process, consider using git tags or branches to allow you to go back to each chapter’s cipher easily. You can analyze your C cipher with Peter Shirley’s at After trying your hand at using CUDA, you can additionally analyze with my CUDA cipher at Be abiding to use the branches I’ve created for each chapter. (E.g. git checkout ch12_where_next_cuda.)

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READ MORE Fall 2018 Film Mini Sessions Part 3 Families READ MORE Fall 2018 Film Mini Sessions Part 2 Families READ MORE Fall 2018 Film Mini ...

Accelerated Ray Tracing in One Weekend in CUDA

But what if you’re curious about how ray tracing actually works? One way to learn is to code your own ray tracing engine.  Would you like to build a ray tracer that runs on your GPU using CUDA? If so, this post is for you! You’ll learn more about CUDA programming as well as ray tracing in one fell swoop.

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