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Throwing custom hardware and raw horsepower at Ray tracing is not a good solution, because it doesn't solve the fact that Ray Tracing is intrinsically too computationally expensive. A game that uses ray tracing is always going to be limited to simpler scenes at a slower framerate than the current methods of 'faking it', which were designed from an efficiency-first perspective. It's like it doesn't matter how hard you push a heavy block to slide it across the ground, its never going to be as fast or as easy as rolling a cylinder. We either need to find a far more efficient algorithm for computing rays, or work needs to start on inventing an entirely new method of realistically lighting 3D scenes.
Even in raytracing you still use geometric figures with shaders on the outside. First ray-tracing i even did was using Real 3d on an Amiga computer, a single x frame took several hrs to render and a x could take almost a day - Amazing to see all progress since the 's. If I remember correctly, the original Crysis was the first game to bring what ray tracing capabilities are to the consumer gaming world. I'll never forget my experience with it not unlike with my first girlfriend. Going from playing Half Life 2 in to Crysis in was like looking into a whole new world of gaming.
Of course, it also required a serious hardware upgrade which I did because I loved it so much. The debate on whether or not the actual game play of Crysis matched the eye candy is still out there however.
And I've had all three series of it. With that said, there is no shortage of games these days that bring even top end hardware to its knees at 4K like Dues Ex. I'm honestly surprised, and frankly amazed that rasterization has advanced to the degree it has!
Raytracing: the next week | cusremymado.gq
Rasterization is a complex visual "hack" in of itself, but a necessary to provide complex scenes at both resolutions and frame rates desired with current chip technology. By contrast, ray-tracing is algorithmically simple to program for very simple compared with rastered these days , but takes a LOT of cycles to burn through the pipeline of calculations. Hence why we never had a good silicon solution to do RT in hardware.
At the end of the day, I think we will all look backward in time in the future and realize that rasterization in hardware was the exception, and not the rule. It's just that superior of a method.
Chapter 6: Rectangles and lights
First ray-tracing i even did was using Real 3d on an Amiga computer, a single x frame took several hrs to render and a x could take almost a day -. Amazing what my Amiga could do with its Denise graphics chip. The ray tracing was awesome to behold but extremely slow to process.
Back in the days, sitting by my Amiga , I told a friend, I would not be impressed by 3D games until they started using real time raytracing. So, that day is soon coming. Also remember my rendering struggles in my Amiga days.
A render I made took a full week on my Amiga And soon we'll get realtime. But actually, I'm rather impressed also with what graphic cards can do with rasters nowdays.
Viva technical progress! Display All 18 comments.
Ray Tracing in a Weekend … in Optix (Part 0 of N :-) )
Most Popular. Subscribe to our newsletter. Other Purch sites. The colour function is implemented using a loop because it is not possible to have a recursive function call in glsl. Only one sample per pixel per frame is calculated.
Raytracing in one weekend
Samples of all frames are added in Buffer A and averaged in the Image tab. Besides that, I also made some other design choices. Most notably: In my code ray.