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Ray tracing tutorial - section 2: diffuse shading
https://www.groovyvis.com/other/raytracing/diffuse.html
Object, the surface normal at that point and the location of the light. Diffuse surfaces reflect photons in all directions equally, so it doesnt matter what direction the ray That instigates the calculation comes from. A surface normal is a vector that is perpendicular to a plane that is tangent to a surface at a point (fig 1.)
Ray tracing (graphics) - Wikipedia
https://en.wikipedia.org/wiki/Ray_tracing_(graphics)
What is diffuse surface? | Technology Trends
https://www.primidi.com/what_is_diffuse_surface
... focusing of light off a wide reflective region onto a narrow area of (near-) diffuse surface ... pass, rays are traced from the eye into the scene to determine the visible surfaces, and the photon map is used to estimate the illumination at the visible surface ...
Ray tracing and shading
http://graphics.cs.cmu.edu/courses/15-468/lectures/lecture3.pdf
Diffuse reflection - light is reflected in all directions - colored by surface color Smooth specular reflection/refraction (e.g. chrome, glass, glaze/varnish) - light reflected/refracted only in a single direction - colored by source color 15 Idealized materials 16 Diffuse reflection 17 Diffuse reflection Real surface Lambertian reflection
Basic Ray Tracing - Inspiring Innovation
https://www.csee.umbc.edu/~adamb/435/Slides/raytrace.pdf
• Trace a ray – Start = point on surface – End = light source – t=0 at Surface, t=1 at Light – “Bias” to avoid surface acne • Test – Bias ≤ t ≤ 1 = shadow – t < Bias or t > 1 = use this light The Dark Side of the Trees - Gilles Tran, Spheres - Martin K. B. Mirror Reflection 23 …
Ray Tracing - University of Washington
https://courses.cs.washington.edu/courses/csep557/19sp/assets/lectures/ray-tracing-1pp.pdf
We'll call these flows “light rays.” wLight rays travel in straight lines in free space. wLight rays do not interfere with each other as they cross. wLight rays obey the laws of reflection and refraction. wLight rays travel from the light sources to the eye, but the physics is invariant under path reversal (reciprocity). 4 Eye vs. light ray tracing
Ray Tracing: intersection and shading - cs.cornell.edu
https://www.cs.cornell.edu/courses/cs4620/2013fa/lectures/03raytracing1.pdf
Ray Tracing: intersection and shading CS 4620 Lecture 3 1. ... Diffuse reflection Top face of cube receives a certain amount of light Top face of 60º rotated cube intercepts half the light In general, light per unit area is proportional to ... Surface.shade(ray, point, normal, light)
Application of Ray Tracing in Radiation Heat Transfer …
https://ntrs.nasa.gov/api/citations/19930019886/downloads/19930019886.pdf
from other real surfaces including the emitter surface i. i ray tracing approach ... • diffuse or specular reflectance (% specularity) • refraction • absorbing media • refraction • surface properties as a function of angle of incidence • bi-directional reflections • direct and reflected solar, albedo, planetary radiant
raytracing - Ray tracing glossy reflection: sampling ray …
https://stackoverflow.com/questions/32077952/ray-tracing-glossy-reflection-sampling-ray-direction
Diffuse reflection means that the angle of the outgoing direction is randomly & evenly distributed about the surface normal's hemisphere. You could think of glossy reflection as being the spectrum between these two extremes, where the location on that spectrum (or amount of gloss) is defined by a "glossiness" factor that could range from 0 to 1.
MaterialDefinitionLanguage - raytracing …
https://raytracing-docs.nvidia.com/mdl/introduction/nvidia_mdl_introduction.220405.A4.pdf
diffuse_edf Light emitted in all directions from the surface of the object, called Lambertian light distribution by analogy to Lambertian diffuse reflection. The spherical geometric object defined with the emissive material is visible in the image, but without the typical perceptual or photograph effects that provide "bloom" or lens distortions.
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