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Hi I was studying an archived article about Radiosity..In that they talked about the radiosity matrix..
1st question :- I have is that whether people use radiosity matrix method anymore or is it just progressive refinement technique that is used nowadays..

2nd question :- When calculating the radiosity matrix and solving it..there would be an entry(element in each row) in which the row and column index are equal..i.e the same surface is the source and the destination..but how is this possible..I mean how can a surface recieve radiative energy from "itself"..Can you explain how this problem is dealt with..

3rd question :- Can you guys give me some link of some demo(with source code) of the implementation of both the techniques(radiosity matrix & progressive refinement) available somewhere so that I can look at the source code and understand the implementation aspect..

Thank you guys..

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