Controlling physical transparency

- [Instructor] In this chapter on ray tracing techniques,…we'll start by looking at how transparency works…in a physically based rendering.…As we saw previously in the course, in a PDR…or physically based rendering,…there's no distinction between…specular highlights and reflections.…They're both controlled by the roughness.…Likewise it is with transparency and refractions.…In an old school first generation shading model,…transparency and refractions are dealt with separately.…

But in a physically based rendering, they're the same.…I've constructed a test scene that works well…for illustrating how transparency works.…It's a very simple polyhedral object…and it's got an image base lighting set up.…I've placed HDR file into the environment.…Let's check in on our render set up.…Go ahead and open that up, we want to be…in target mode active shade.…The active render is ART and we're going to…render physical camera 001, let's lock that.…

And we're just doing a 480 by 480 frame.…And our quality is 30 decibels.…We'll do a render, okay there's our ideal diffuse material.…