Problems rendering glass

[itsallgoode9]

okay, can you move the bottle a bit up in the scene so it does not touch the ground?
and then see if the spot goes away

if theres not liquid then that`s not a problem

also, what is your scene scale?

Yeah, i've tried that. i even tried completely removing the ground plane and still get the problem. I have the scene units set to CM but I have the the "scene scale" parameter in octane's settings set to .01 to account for that.

[prodviz]

There seems to be an issue with the scene.
Everything has a pretty bad delay.

I imported the bottle and infinity curve in to a new scene, tweaked light strength, ray depth and subd level etc. and got this:




Here's the new maya file:
https://dl.dropboxusercontent.com/u/946 ... tle.mb.zip

[itsallgoode9]

thanks for taking a look at this prodviz, i'll let you know how it works, I relaly appreciate it

[itsallgoode9]

Thanks for sending that prod. I opened it and rendered without changing any settings and I got something WAY different than you. here's the render, any clue what's going on:


I did get a bunch of errors on opening but I have no clue what those adttributes are and if they're causing any problems:
// Error: line 0: The mesh 'Infinity:pPlaneShape1' has no 'sdt' attribute. //
// Error: line 0: Node "Infinity:pPlaneShape1" has no attribute "sdt". //
// Error: line 0: The mesh 'Infinity:pPlaneShape1' has no 'ugsdt' attribute. //
// Error: line 0: Node "Infinity:pPlaneShape1" has no attribute "ugsdt". //
// Error: line 0: The mesh 'bottle:BottleShape' has no 'sdt' attribute. //
// Error: line 0: Node "bottle:BottleShape" has no attribute "sdt". //
// Error: line 0: The mesh 'bottle:BottleShape' has no 'ugsdt' attribute. //
// Error: line 0: Node "bottle:BottleShape" has no attribute "ugsdt". //
// Error: line 0: The mesh 'bottle:BottleShape1' has no 'sdt' attribute. //
// Error: line 0: Node "bottle:BottleShape1" has no attribute "sdt". //
// Error: line 0: The mesh 'bottle:BottleShape1' has no 'ugsdt' attribute. //
// Error: line 0: Node "bottle:BottleShape1" has no attribute "ugsdt". //

[prodviz]

I'm not at the pc at the mo, but I'm using Maya 2015 and I think I'm on the 2.2 Octane plugin.
Are you using 2.2?

[itsallgoode9]

i'm on 2014 and 2.15 I think. I'll update ot the latest and see how it goes. Thanks for you help, I have a deadline tomorrow that this is causing major issues for

[prodviz]

Let me know how you get on.
I could look at this again for you tomorrow morning if that helps (PM me if need be).

[itsallgoode9]

actually, I didn't get the HDRI loaded in so that was causing the problem. it looks like it 's working now. I'll give it a try with my old camera angle and hope it works! thanks

[itsallgoode9]

in the end, it looks like the issue has been not turning up the reflectivity high enough, causing areas of heavy refraction to go completely black. I didn't realize that the reflectivity was affecting areas like this.

After running into this issue, the way reflectivity is implemented is potentially concerning to me. Maybe my understanding is wrong, but this is making it seem like I can't get correct refractions unless I crank up the reflectivity to high, unrealistic values.

[prodviz]

Glad you got the issue fixed.

Yeah, compared to other render engine experience the depth setting seems high.
However, in my experience, this doesn't have a major impact on render time, so for me it's no real issue.