Specular

Here is the specular component animating.

This is one thing, the specular highlights.

There's also the BSSRDFs which stands for Bidirectional Surface Scattering Reflectance

As well as the reflectance properties (the color), the... the...in a more general case it's called a bidirectional reflectance distribution function, and of course the position and distribution of the light sources.

Assign the shininess, and also assign the specular color to be this.

The diffuse term drops off smoothly, but the specular suddenly drops to zero, giving a pretty bad result. By using the Lambertian dropoff, the specular term now fades properly.

One idea is to attenuate the specular term by the lumbersian fall off.

If both the specular and diffused components are multiplied by the same color the material

A final instance where things might go wrong is reflective objects that have specular reflections.

The graph of the angle between N and H, versus the specular intensity, is like this.

This reflection that we just saw on her latex, the hot specular highlight, that is a piece of styrofoam.

For example, if the specular component is given a white color, the object looks more like a shiny plastic.

Metals themselves are essentially all specular. Let me say that again, because all this time we've been living a lie.

There's, there is work from the human vision literature from Landon McCamp Who were trying to classify various edges that's belonging to either elimination changes or reflectance changes.

Just to run by another one this is a plan to brighten the reflectance of ocean clouds, by atomizing seawater that would brighten the albedo of the whole planet.

One technique worth mentioning with this reflection model is that you can get the specular highlight a different color than the diffuse components.

In other words, just like diffuse, make the specular term drop off as the angle of the light to the surface becomes less straight.

Draws a stream of rising, undulating 3D bubbles, rising toward the top of the screen, with transparency and specular reflections. Written by Richard Jones 1998.

Note that the specular color is different than the material color. You should check the online documentation to make sure you're setting the right color.

Using the Lambertian N dot L term also eliminates a serious problem with specular falloff. You may have noticed it yourself with the basic Blinn Phong model.

We want, or we need specular highlights, something mirrored in the latex, like over here and over here, something like a tall, slim, but big, bright lightsource, which is mirrored.

Now, if we turn the polarizers around just a little bit, we can actually bring that specular reflection of the skin back in, and you can see she looks kind of shiny and oily at this point.

And in that episode, I answer the question and I get a chance to explain what would normally be kind of dry topics optics, diffuse versus specular reflection, how light works, how light works on the retina, and even the etymology of color terms

And in addition, we've actually used polarizers on all the lights just like polarized sunglasses can block the glare off of the road, polarizers can block the shine off of the skin, so we don't get all those specular reflections to take this map.

So, if we use information that comes off of this specular reflection, we can go from a traditional face scan that might have the gross contours of the face and the basic shape, and augment it with information that puts in all of that skin pore structure and fine wrinkles.