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At the beginning of the render, the Sampling Levels increase faster, and the main render view in Maxwell.exe will update with each new SL reached. As the render goes on however, it will take longer and longer to reach the next SL, and so the main render view will update every 10 minutes. You can also choose how often to update the main render view from the Maxwell.exe preferences (File>Preferences). It can be useful to set this time to a higher minimum because each time the render view updates, Maxwell writes a new version of the MXI file to disk and the rendering stops until it has successfully written that MXI, then resumes the render. To avoid this pause/resume/pause/resume especially at the beginning of the render, you can set a minimum write time to 15 minutes or more for example. Please see the Preferences section at the bottom of on the User interface and menus page for more info.
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