Materials and Lights Messed up after opening the file later

[archbrick781]

Hi everyone !
i have been working on a render for a couple of days now and today i opened the file and start IR(interactive rendering). To my surprise i saw some of the lights messed up. i checked in the model , the rectangular lights i had created were all rotated except  one. Moreover i saw in the model that solid black material was turned into a transparent black material. When i opened the material editor and choose pick material to see material properties, it was a solid brown(though the original material was solid black).The material i used was corona legacy material, after reopening the file it was a physical material. Can anyone tell me what's going on?

[GeorgeK]

Hi everyone !
i have been working on a render for a couple of days now and today i opened the file and start IR(interactive rendering). To my surprise i saw some of the lights messed up. i checked in the model , the rectangular lights i had created were all rotated except  one. Moreover i saw in the model that solid black material was turned into a transparent black material. When i opened the material editor and choose pick material to see material properties, it was a solid brown(though the original material was solid black).The material i used was corona legacy material, after reopening the file it was a physical material. Can anyone tell me what's going on?

Was your scene converted using the 3dsMax Scene converter by any chance?

[NazarVitkovskyi]

Also, would be good to know - which version of Corona you are using?