The aim of this work was, to compare existing real-time Global Illumination solutions to determine which of them is best in terms of performance and image quality. For this multiple methods and algorithms were compared with each other and tested in quality, functionality, dynamic, scalability, performance and implementation.
For image quality comparision an offline rendered scene was compared to the images produced by the algorithms and methods. In the end an overview of all evaluated methods and algorithms was created, so one can easier determine which of the methods and algorithms fits their needs.
You can have a look at the Thesis here (German language):
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