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Hi,

I'm try to read back multilight data. I have a scene with some planar emitters, one camera and an mxi emitter. When closing maxwell window after changing values (and refreshing) the importing dialogue pops but shows the original data for every item instead of the changed values. So, it changes nothing.

All materials are embeded, not referenced.

This usually happens when Maxwell didn't save the new values to the MXI file. Did you change the intensities after the render was finished? In that case, they are not saved automatically, you have to manually go to File -> Save MXI. Make sure you save over the MXI file used during the render, not as a new file, since the plug-in wouldn't know about any new MXI files you create.

I've tried both; changing intensities before and after finishing render with the same result: returning values are the same as the original ones.

And did you try saving the MXI manually after making the changes?

No. Now I've tried and it worked. In the process I noticed something odd that could be the key of the problem. When launching the render I did not specify any path for the mxi so it saved to a temporal file with a random mxi name; when hitting "save MXI as" I noticed it suggested a different file name from the one shown in maxwell window. Maybe when finishing, Maxwell is saving the file with a name different from the one used when launching the render.
Or maybe not, dunno.

No, that shouldn't be a problem. Maxwell only saves intensity changes to the MXI file when it reaches a new SL, so maybe you were shutting it down before it managed to do so (or the render was stopped, in case you always need to save manually). Or maybe there are some other cases when it forgets to save, I'll check that.

The name suggested in the save as dialog is a known issue - it doesn't use the name configured in the output MXI field, but the name you've used last time you saved a MXI out of Maxwell. I've reported this to the engine guys before, but it probably got overlooked or pushed back by more important things. I'll poke them again. :)