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pickle-eye

Will it often be the case where we use approximations to find a quicker/more efficient solution, even if the result isn't 100% correct? It seems for some areas of graphics, it'd be good enough to have a really close solutions, rather than insisting on a perfect answer.

motoole2

For real-time or interactive graphics (e.g., video games), performance is extremely important. This is a case where quick & approximate renderings is better than slow & accurate renderings. In other areas of graphics (e.g., rendering photorealistic images for films), accuracy is key. So in short, it all depends on the specific application.