Disable Double-Sided globally

[CiroCardoso3v]

Is it possible to disable double-sided globally instead of adding the Arnold Properties Modifier? Or there is a way to do that with Operators?

[Stephen.Blair · Accepted solution]

You can do it with operators.

Selection:

*.(@node=='polymesh')

Parameter assignment:

sidedness=0

0 makes it single-sided for all ray types (camera, diffuse reflection, transmission, ...)

[CiroCardoso3v]

Thank you so much. I was trying this using double_sided = 0. Are those Parameter assignments available as a list?

[Stephen.Blair]

@ Unfortunately not in the 3ds Max user interface

The values are like this:

• camera 1
• shadow 2
• diffuse transmit 4
• specular transmit 8
• volume 16
• diffuse reflect 32
• specular reflect 64

So if you want an object to be double-sided for camera and shadow rays and diffuse reflection, you would put sideness=35

1 + 2 + 32 = 35

[CiroCardoso3v]

I tried that but isn't working.

[Stephen.Blair]

why are there forward slashes in the selection expression?

[CiroCardoso3v]

Yes, it was a mistake, but then I tried the following

*.(@node=='polymesh')

/*.(@node == 'polymesh' or @node == 'ginstance')

/Box*

Still nothing changes. And then replace the sideness = 0 with shader ="/Gray" and it works. So the selection work, is just the bit about the sideness that isn't working.

[Stephen.Blair]

@

Oops, typo...

sidedness

not

sideness

[Stephen.Blair]

Fixed the typo and changed sideness to sidedness

[CiroCardoso3v]

Thanks. You are a star