21. Course surveys.Finish set 26. Slide set 27 - compositing and blending.

1. Suppose we have two images with opacities a1 and a2. What is the opacity of the transluent material that we create by using the two in series? Give an expression of the combined material.

2.Devise a method of using texture mapping for the diaplay of arrays of three-dimensional pixels(voxels).

3.OpenGL has a variety of parameters that determine how texture is applied, Wrapping parameter is one of them. What is the function of Wrapping parameters ?

4.What is Accumulation Buffer for? What's its disadvantage?

5.