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Ray tracing tutorial - section 2: diffuse shading
https://www.groovyvis.com/other/raytracing/diffuse.html
Simple Ray Tracer, Diffuse Shading problems c++ - Stack …
https://stackoverflow.com/questions/20784135/simple-ray-tracer-diffuse-shading-problems-c
Firstly, if your getRayDirection () is doing what it says it is, it's producing a direction, and not a gaze point, so you should not be subtracting the ray origin from it, which is a point. (Although directions and points are both represented by vectors, it does not make sense to add a point to a direction)
Ray Tracing (Shading)
https://www.cs.cornell.edu/courses/cs4620/2012fa/lectures/35raytracing.pdf
•Usually include ambient, diffuse, Phong in one model •The final result is the sum over many lights 16 L = L a+ L d+ L s = k aI a+ k dI max(0, n · l) + k sI max(0, n · h)p L = L a+ N i=1 [(L d) i+ (L s) i] L = k aI a+ N i=1 [k dI imax(0, n · l i) + k sI imax(0, n · h i)p] n n © 2012 Kavita Bala • (with previous instructors James/Marschner)
Ray Tracing: shading - Cornell University
https://www.cs.cornell.edu/courses/cs4620/2017sp/slides/05rt-shading.pdf
Ray Tracing: shading 1 • With eye ray generation and scene intersection for 0 <= iy < ny for 0 <= ix < nx { ray = camera.getRay(ix, iy); c = scene.trace(ray, 0, +inf); ... Lambertian shading diffuse ...
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
Introduction to Shading (Diffuse and Lambertian Shading)
https://www.scratchapixel.com/lessons/3d-basic-rendering/introduction-to-shading/diffuse-lambertian-shading
If we put this two components together, we can say that the amount of light reflected by a diffuse surface is equal to the amount of light it receives multiplied by the albedo (the ratio of incident light this is actually reflected by the surface, i.e. not absorbed): Diffuse Surface Color = albedo = ρ d ∗ Incident Light Energy ∗ N. L.
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
how to combine diffuse and specular color? - Stack …
https://stackoverflow.com/questions/15619830/raytracing-how-to-combine-diffuse-and-specular-color
You can dim the light source a bit, that is multiply the diffuse-strength you calculated form the cosine by the brightness - say 0.8 or 0.7. You could limit the color-saturation (green that is) of the sphere and make it less greeen ;)
Toon Shading Using Distributed Raytracing
https://www.cs.rpi.edu/~cutler/classes/advancedgraphics/S17/final_projects/amy_toshi.pdf
which make use of toon shading also support reflective objects in scenes. 1.2 Ray Tracing Ray tracing, as described by the seminal text An Improved Illumi-nation Model for Shaded Display, makes use of a physical inter-pretation of the world to posit a rendering implementation which is especially robust in the way of global effects such as ...
Raytracing Reflection, Refraction, Fresnel, Total Internal …
https://blog.demofox.org/2017/01/09/raytracing-reflection-refraction-fresnel-total-internal-reflection-and-beers-law/
When shading a point on the surface, you would calculate both the reflected color at that point on the surface, and the diffuse shaded color at that point, but you multiply the reflected color by 0.02 and the diffuse shaded color by 0.98 and add them together. Doing this gives a result like the below:
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