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An MXI file is always written to disk when Maxwell renders and it updates with every change in SL. If you don't specify an output path for the MXI file, it will be written to your systems temp folder. It is always a good idea to specify an output path for the MXI when rendering, not just an image output path. This will ensure you can always resume a render, even if the systems temp folder is purged, and it allows you save several versions of your render using different exposure or Multilight settings, without having to re-render.
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| On In Maxwell 2.7 we have introduced a transparent, loss-less compression system for both MXS and MXI files. Compression ratios are excellent when rendering additional channels such as alpha, shadows or ID's. With all channels activated, the MXI file can be 4x smaller. The compression system does not affect save performance more than 1-2%. |
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