How can I check if a Texture is present in VOP?

[iGoddess]

Hi All,

I'm looking for some help.

I'm digging into shading VOPs and want to set some conditional switches.
Unfortunately, I could not find relevant references for this particular case.

I want to check if the Texture node (Opacity) has a valid link and switch to a constraint if not. Two-way switch is set to RGB color.

 

It does not work the way I thought it should. What do I miss here? Maybe is there another, more obvious way to achieve it?

 

Thanks a lot!