Let's cover an example of these various blending functions in action:

1. Open the ch06_09_blending.html file in your browser. You will see an interface like the one in the following screenshot:

2. This interface has most of the parameters that allow you to configure alpha blending. The default settings are source gl.SRC_ALPHA and destination gl.ONE_MINUS_SRC_ALPHA. These are parameters for interpolative blending. Which slider do you need to use to change the scaling factor for interpolative blending? Why?

3. Change the sphere alpha slider to 0.5. You will see some shadow-like artifacts on the surface of the sphere. This occurs because the sphere back face is now visible. To get rid of the back face, click on Back Face Culling.
4. Click on the Reset button.
5. Disable the Lambert Term and Floor buttons.
6. Enable the Back Face Culling button.
7. Let&apos...