There are several ways to render an object

Answer should be original, and similarity (plagiarism) not more than 10% this is very important otherwise I will be in trouble.

Answer should be a clear explanation and should be clear understanding (500 words).

Answer should be references on Harvard style (Not use Wikipedia) should be Academic Articles or books.

When use citation from any reference please keep it between "citation" (Author,Year),please citation should be not more than 5%

As reference you can use the following book:

Chapman, N. and Chapman, J. (2009), Digital Multimedia, 3rd edition, John Wiley & Sons, ISBN10: 0470858907 ISBN13: 978-0470858905

Assignment is:

There are several ways to render an object and the choice depends on the use the work will be put to:

For Ray tracing explain under what circumstances you would and would not use it. For each occasion explain what are the alternatives and their limitations