please confirm

empty scene with MR as renderer
assing enviroment map “mr Physical sky” and DISABLE use map
save file and re-open file
use map is ENABLED

another 2 hour waste of livetime to spot it - thx AD

Hi QM - long time no see ;-)

Yes, I can confirm that behaviour, but it is very specific to the “MR Physical Sky” as the Use Map setting is saved/restored correctly with any other (MR) Material I tried (in the Environment slot).

Max 4.2 through 2013.
XP-64 (SP2)
NVidia 9800GTX-512 (Driver 266.58).
Core 2 Quad Q6600 2.4GHz, 8Gb Ram, DX9.0c.

hm ... do we know us Steve ?

max9 2008 and 2009 do have that bug

so in max 2013 it is solved then

Hmm - could be the wrong QM I suppose - there’s been one around since the Webboard days (pre The Area). If you’re a different one, apologies :-) (but hi anyway).

Max 4.2 through 2013.
XP-64 (SP2)
NVidia 9800GTX-512 (Driver 266.58).
Core 2 Quad Q6600 2.4GHz, 8Gb Ram, DX9.0c.