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Ray Tracing (Shading)
https://www.cs.cornell.edu/courses/cs4620/2012fa/lectures/35raytracing.pdf
Ray Tracing - Carnegie Mellon University
http://graphics.cs.cmu.edu/nsp/course/15-462/Spring04/slides/13-ray.pdf
Recursive Ray Tracing • Calculate specular component – Reflect ray from eye on specular surface – Transmit ray from eye through transparent surface • Determine color of incoming ray by recursion • Trace to fixed depth • Cut off if contribution below threshold Angle of Reflection
Ray tracing tutorial - section 7: specular highlights, …
https://www.groovyvis.com/other/raytracing/specular.html
This is the same as the angle between the reflection off the surface of the incomming ray and the ray to the light, both Of which have already been calculated for reflections and lighting. So, s = L · R, where s = specular, L = the …
Tracing - Johns Hopkins University
https://www.cs.jhu.edu/~cohen/RendTech99/Lectures/Ray_Tracing.color.pdf
Distributed Ray Tracing Apply distribution-based sampling to many parts of the ray-tracing algorithm Fuzzy reflection/transmission • perturb directions reflection/transmission, with distribution based on angle from ideal ray Motion blur • perturb eye ray samples in time Depth of field • perturb eye position on lens Fuzzy shadows/penumbra
Ray tracing and shading
http://graphics.cs.cmu.edu/courses/15-468/lectures/lecture3.pdf
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 Lambertian surface Also called ideal diffuse reflection Basic Ray Tracing Pipeline 20
MaterialDefinitionLanguage - raytracing …
https://raytracing-docs.nvidia.com/mdl/introduction/nvidia_mdl_introduction.220405.A4.pdf
Fig. 5.5 – specular_bsdf specular_bsdf This image combines both the reflective and transmissive factors of specular_bsdf. If transmission and reflection are enabled at the same time, they are combined using a Fresnel term based …
Scattered plus specular transmittance equals Fresnel …
https://lambdares.com/support-posts/scattered-plus-specular-transmittance-equals-fresnel-transmission/
Scattered plus specular transmittance equals Fresnel transmission Solution TracePro calculates the Fresnel Reflection and Transmission, and when scatter terms are added to a Fresnel Type Surface Property, the Fresnel R and T values become the Total R and T. The A, B, and g coefficients define both the distribution and the magnitude of the scatter.
Realistic Raytracing - Zack Waters - WPI
https://web.cs.wpi.edu/~emmanuel/courses/cs563/write_ups/zackw/realistic_raytracing.html
The only difference is that instead of perturbing the ideal specular reflection ray you are now perturbing the ideal specular transmission ray in order to generate a set of secondary transmission rays. A wider distribution of transmission rays will make the glass like material appear rougher. Effects such as frosted gloss can be achieved.
how to combine diffuse and specular color? - Stack …
https://stackoverflow.com/questions/15619830/raytracing-how-to-combine-diffuse-and-specular-color
This has long been an issue with the "specular + diffuse + ambient" model of illumination. Namely, it is a hack and therefore, has no guarantee of correctness. If you're so keen on cementing your fundamentals first, take a look at the excellent book "Physically Based Ray Tracing" by Matt Pharr and Greg Humphreys.
Specular reflection - Wikipedia
https://en.wikipedia.org/wiki/Specular_reflection
The law of reflection states that a reflected ray of light emerges from the reflecting surface at the same angle to the surface normal as the incident ray, but on the opposing side of the surface normal in the plane formed by the incident and reflected rays. This behavior was first described by Hero of Alexandria ( AD c. 10–70).
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