Involuntary change in camera - Shutter speed changes from 1/1000 to 0.02

[Cinemike]

For some reason, the shutter speed changed in my scene from 1/1000 to 0.02 (Corona camera, overriding everything). The result: A totally overexposed image (of course, that's 50 seconds, some taking over from the ISO, something else?). I have no idea what actually caused it, but it happened at least with two scenes when I saved them under a new name (from 1a to1b, for example). The former scene then had this strange value applied to, too, when I opened to check. Must have happened while saving, I guess.

My system: Win 10, i7-4770k, C4D R18, Corona Beta 1 from April 7.

I will try to isolate this issue more, but maybe someone of the developers has a clue or can get one from this description.

CU
Michael

[Cinemike]

Create a new scene, set Corona as renderer. Add a Corona camera. Set shutter speed to 1/1000. Save scene.
Close. Re-Load.
Shutter speed is 0.02.

[TomG]

I've seen this too - though, oddly, the effect only appears in the render if I click on the Corona Camera Tag. I was having a look at this free scene at https://www.patreon.com/posts/free-scene-c4d-8308978 and it renders as expected, unless I click on the Tag, in which case the 0.02 shutter speed takes effect (so, perhaps the change to 0.02 only happens when clicking on the camera tag?)

[Cinemike]

... unless I click on the Tag, in which case the 0.02 shutter speed takes effect (so, perhaps the change to 0.02 only happens when clicking on the camera tag?)

Like a Schrodinger's cat camera tag - working and not working at the same time, until you click/check? Quite possible, something needs to trigger it.
Anyway, to me it only happened in my today's test after saving, closing and reloading the scene. But then it is there, reliably.

A Schrodinger's cat bug that needs saving - that's almost of philosophical-theological proportions ;)

[Cinemike]

@Tom G.: But you are right. It seems that the tag has to be active during saving to be affected. I made some changes in the tag, selected another tag and saved the scene.
After reloading, it still rendered correctly until I clicked the tag.

[TomG]

Thanks for the testing and info! All good to know and should help narrow things down!

[Cinemike]

Thanks for the testing and info! All good to know and should help narrow things down!

You are welcome!
Corona is so much fun to use that a bug now and then cannot scare us away :)

[Cinemike]

Any chance to see this fixed soon?

[houska]

Any chance to see this fixed soon?

We were fixing other issues recently, but I'll check this one tomorrow, so hopefully we can release it in one of the nearest daily builds. Thanks for a detailed report!

[Cinemike]

Thank you for your efforts!

[furtonb]

What is still worth noting, that the camera shutter speed is still having the lower limit of 1/1000 second, and the upper limit of 100 seconds.
(The F-stop for instance doesn't seem to have this limitation, it actually can be set lower to 1 as well.)

(Mantis ID: 0002383)

[Cinemike]

Time to play Tina Turner's "You're simply the best"!
Fixed in the beta from April 21.
Thx :)

[houska]

What is still worth noting, that the camera shutter speed is still having the lower limit of 1/1000 second, and the upper limit of 100 seconds.
(The F-stop for instance doesn't seem to have this limitation, it actually can be set lower to 1 as well.)

(Mantis ID: 0002383)

Thanks, furtonb! If it is in Mantis, it cannot get lost, so we will eventually get to it.