I am using some Xpresso to drive the Corona Sun position from the C4D Physical Sky (Time and location parameters)... this is purely for the positioning of the Corona Sun, and should have no other effect. Yet, when I am test rendering in VFB - most times the Sun will not actually render, unless I make some changes to the time/ and location parameters... sometimes I will click forward an hour, and back again - sometimes it works, sometimes it doesn't...
I am not sure if this is the only case of the Corona Sun not rendering, but if so - what could possibly be the reason?
I am not really knowledgeable in Xpresso, so perhaps it's something with the priority settings, which are currently set to "Expression - 0"
Any help appreciated, or if someone can confirm any issues with Corona Sun, that would also be useful.