Hi,
not sure if its a bug or more likely a result of hacking a previous scene. HD Cache takes forever to compute with max standard photometric lights and ies web plus a few omnis and spots (all turned to Corona shadows). Replacing with Corona lights and using IES and it becomes nice and fast again. Obviously it`s designed to work better with native lights but maybe defeats the point of making max lights compatible if they slow it all to a crawl ?
checking again seems to be just max photometric lights.
Just an observation, not a complaint or anything.. I expect you know this already..
Additional.. again probably a quirk or part of the corona light script converter..
I remade the TPhotomentrics as CoronaLights and added an IES.
I then merged some old vray plane lights and ran the corona light converter script, it made them all IES lights when they should be just plane lights. Could be Corona remembers me adding the IES file from before when and adds it subsequently to other new lights or just the converter script messing up.
Mentioned just in case..
Just created a new Corona Light in a different scene and it added the same IES file from before. Good/Bad ? Not sure, could save time for some scenes or be a pain if creating a bunch of different lights.
ok, problem is that currently the 3dsmax lights behave in corona like in mental ray/vray (more lights = slower rendering). I will probably switch them to corona-style (more lights = same time, maybe little bit more noise) in the future.