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graphics - glossy reflection in ray tracing - Stack Overflow
https://stackoverflow.com/questions/15846867/glossy-reflection-in-ray-tracing
raytracing - Ray tracing glossy reflection: sampling ray …
https://stackoverflow.com/questions/32077952/ray-tracing-glossy-reflection-sampling-ray-direction
For diffuse or glossy reflection, you need to be able to randomly generate a ray from the distribution of possible reflection directions, and then follow it. Then, take many samples and average the result. So, for glossy reflection, the key is that the distribution of reflected rays is centered about the specular direction.
Ray Tracing: Reflection and Glossy Reflection - Blogger
https://ray-tracing-conept.blogspot.com/2015/01/reflection-and-glossy-reflection.html
GLOSSY REFLECTION: Distributed Ray Tracing Some surfaces, like metal, are somewhere between an ideal mirror and a diffuse surface. Some discernible image is visible in the reflection but it is blurred. We can simulate this by randomly perturbing ideal reflection rays.
Ray tracing - glossy reflection - Game Development Stack …
https://gamedev.stackexchange.com/questions/105807/ray-tracing-glossy-reflection
1 Answer Sorted by: 2 Generating random directions efficiently is a major issue, especially in GPU implementations of anything like ray tracing. In my research about the matter I've been using an implementation described here. The solution refers to single values but can be easily applied to vectors as well.
Chapter 25 Glossy Reflection - Ray Tracing from the …
https://www.oreilly.com/library/view/ray-tracing-from/9781498774703/K00474_C025.xhtml
have implemented glossy reflection in your ray tracer; have more tools to produce nice images. In this chapter, you will learn how to render glossy reflections. Many real materials are imperfect reflectors, where the reflections are blurred to various degrees due to surface roughness that scatters the incident radiance.
Ray-Traced Glossy Reflections Using Screen-Space …
https://www.nvidia.com/en-us/on-demand/session/gtcfall20-a21792/
Ray tracing glossy reflections often requires hundreds of samples per pixel (spp) to converge to a visually pleasing noise-free image. Game engines targeting 60+ Hz framerates on current generation GPU hardware can only afford to ray trace a few rays per pixel per frame in total, often allowing less than 1 spp per ray tracing effect.
Screen Space Glossy Reflections - Roar11
http://roar11.com/2015/07/screen-space-glossy-reflections/
Glossy Ray Traced Reflections. ... The ray tracing portion of this technique is directly derived from Morgan McGuire and Mike Mara’s open source implementation of using the Digital Differential Analyzer (DDA) line algorithm to evenly distribute ray traced samples in screen space [1]. Their method handles perspective-correct interpolation of a ...
ray tracing - glossy reflections - Graphics and GPU ... - GameDev
https://www.gamedev.net/forums/topic/352365-ray-tracing---glossy-reflections/
reflection += RayTrace (ReflectGlossy (Ray, Normal, Random ()) reflection /= samplecount and ReflectGlossy generates a ray in direction of the reflection, with some displacement according to the Random () value, jittering the ray. that means you suddenly start to raytrace much more rays.
Basic Ray Tracing - Inspiring Innovation
https://www.csee.umbc.edu/~adamb/435/Slides/raytrace.pdf
Ray Traced DOF • Move image plane out to focal plane • Jitter start position within lens aperture – Smaller aperture = closer to pinhole – Larger aperture = more DOF blur Glossy Reflection 49 Motion Blur • Things move while the shutter is open Ray Traced Motion Blur • Include information on object motion • Spread multiple rays per pixel across time
Casual Shadertoy Path Tracing 2: Image Improvement …
https://blog.demofox.org/2020/06/06/casual-shadertoy-path-tracing-2-image-improvement-and-glossy-reflections/
Glossy Reflections – We make some objects shiny Anti Aliasing Adding anti aliasing to a path tracer is super easy. All we need to do is add a random number between -0.5 and +0.5 to our pixel’s location, on the x and y axis. Since the pixel color is the average over lots of frames, what this does is give us the “average color of the pixel”.
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