How to make object in viewport appear transparent?

[JohnLancaster]

For example, I'm working on an eyeball and the outermost layer I need to appear mostly transparent in viewport 2.0.

Any ideas? 

[damaggio]

Why don't you make the blinn transparent?

[JohnLancaster]

Because it's not a blinn shader, it's an Arnold standard shader

[damaggio]

You could have told us that very important piece of information from the begining John...I don't use Arnold and I don't know how much Viewport supports Arnold nodes.

Maybe someone else can chimme in on this.

Good luck.

[JohnLancaster]

Can I get it to use a blinn but render the arnold shader?

[pshwayka]

Why don't you just try it?

[JohnLancaster]

I did but I don't know how.

[pshwayka · Accepted solution]

The easiest way would be to use render layers.  In the master layer, apply a blinn shader to the outer layer of the eyeball and crank up the transparency, as damaggio suggested. Then select everything in your scene, and assign it all to a new render layer.  In the new render layer, assign your AI Standard material to the outer eyeball material. This will override the blinn in that layer.

Select the master render layer when you want the outer eye to appear transparent in Viewport 2.0.  Select layer 1 when you are ready to render.

[JohnLancaster]

Thank you so much dude! 

Little bootleg, but it works all the same!!!

[pshwayka]

No problem.  Glad it made sense!