Brighter render with saved irrmap than original render

[vergefio]

Hi guys, i've launched a render of 3500*2600 with save irrmap and lc option on. Let's say this render it's brigther 1. Now i've make some little changes to prevoius scene (like bitmap change, or scale and so on) and i'd like to reuse those saved map (as always) avoiding to recompute all scene (render took 3h)... but, now render output has 1,5 as brigther value!!! I really don't know what happen... exactly same settings! So I tried to recalculate irrmap and lc with region render and now my renders are even brigther 1,5... why??

Someone has encountered this before??

In few moments i'll post comparative renders...

[vergefio]

Sorry guys, during passage from a pc to another, ies file has change intensity value

[priad]

It's because when you reload ies they always take their default value.

[vergefio]

yep