ThePhilosopher's New Mountains of Altair

Sevrin

PA_ThePhilosopher said:

Hey guys,

Thanks to Mark for notifying me of this discussion. 

I was not aware of this issue in 4.15 until you guys discovered it. Taking a look over the set now, it appears there was a change in how Iray renders opacity maps on objects within a volumetric light cube. Even when I turn the opacity down to 0, those black tints are still present on all objects, which doesn't make sense. 0% opacity should mean that the object is invisible. But for some reason, Iray is now rendering all objects with opacity set to 0 in the scene. 

You can confirm this by creating a flat plane primitive in the scene, and turning its opacity to 0. It looks exactly the same, with that black tint. Strange. 

I must admit, this is discouraging for me to see, and a significant step back for Iray, in terms of being able to render objects within volumetric cubes. Half of my products utilize volumetric light, so I would expect this problem to be present elswhere as well. 

 

-Davide

Thanks for chiming in.  Yes, it does appear to be a general issue with opacity and volumetric props.  This is the basic atmospheric setup from Render Studio 2.0 with a Now-Crowd billboard by @RiverSoftArt

Oh, and hair is affected, as well.

Timotheus

Discouraging is certainly a good word, even if it is a bit of an understatement. I'll be submitting a ticket on this. 

Tim

PA_ThePhilosopher

Thanks for submitting the support tickets on this guys. Let us know any updates you receive please.... 

Also, looks like people are having problems viewing my promo videos. I cannot use Youtube due to their overly strict copyright algorythms. Vimeo is no longer an option either, since they stopped allowing commerical content. So I have to find alternatives to host my videos. Looks like LBRY is not working out too well... will need to find another solution.

-Davide 

WendyLuvsCatz

I make extensive use of YouTube's audio library myself to avoid such issues

DMax

I am having some difficulty with The Last Wave (https://www.daz3d.com/the-last-wave)... would this be another example of this issue with opacity and volumetric props? (please refer to attached image)

Also experienced something weird with Infinite Sands (https://www.daz3d.com/infinite-sands) earlier today which made it unusable so after much fiddling I gave up and had to use a different product for a desert landscape.

Sevrin

DMax said:

I am having some difficulty with The Last Wave (https://www.daz3d.com/the-last-wave)... would this be another example of this issue with opacity and volumetric props? (please refer to attached image)

Also experienced something weird with Infinite Sands (https://www.daz3d.com/infinite-sands) earlier today which made it unusable so after much fiddling I gave up and had to use a different product for a desert landscape.

Please post about this in the Daz Studio discussion thread for the version you're using.  I've made a couple of posts in the beta thread, already. 

DMax

 

Please post about this in the Daz Studio discussion thread for the version you're using.  I've made a couple of posts in the beta thread, already. 

Thank you @sevrin ! First time I am venturing out of The Commons and New Users :D

dawnblade

I received an update from the Help Center today regarding the opacity and volumetric issue: "This is a known issue that has been reported to NVIDIA to update. When there is an update, our Developers will announce it in our Change Logs." So Nvidia has to fix it, then the Daz developers can do their thing with it.

Timotheus

Any update on the Iray issue with opacity?

Sevrin

Timotheus said:

Any update on the Iray issue with opacity?

Unfortunately not.  And the opacity reduction workaround for hair doesn't work with the planes, either. 

Subtropic Pixel

So it's been nearly 5 months then, huh?

Richard Haseltine

Subtropic Pixel said:

So it's been nearly 5 months then, huh?

It's an Iray issue, not something Daz can fix.