- [Voiceover] Now lets take a look at how to do opacityand transparency in Arnold.Now I separated this out because it is adifferent process than you would normally see in a renderer.Now only do you have to set it up in the materialyou also have to set it up in the geometry.So, there is a little bit more process to gettingtransparent objects in Arnold.So let's go ahead and make this object transparent.I'm going to select it, it's called nurbsSphere1.And we're going to go into Lighting/Shading,assign new material, I'm going to go over tothe Arnold tab here and I want to just select anaiStandard material.
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So now once I have that selected let's go intothe Hypershade and actually author this material.So, I've got aiStandard3 which is thisparticular material.First thing I'm going to do is go ahead and justturn up the exposure here.Make sure I'm in Arnold.And now with this aiStandard materialwe can certainly give it a color.So I'm going to ahead and just give ita reasonably nice color here.
And we can go through add some specularity.Now if this is glassy it's going to be a little bit shiny.And then we also have reflection,which we certainly want to add just a little bit.I'm going to add about .1 for a reflection.Now, the key element here for transparency and opacityis the refraction roll out.So, what we need to do iswe need to work with the opacity slider.So if I turn this down it will create opacity.
And as you can see it's starting to render that out.You can see that the object is slightly opaque.And we can also affect refractions.So, if we want we can give it an index of refraction.I'm going to give it say an index of say .95.And then we can also turn up the weightof that refraction if we want.So I'm going to turn that up to about .1 or .2.So now that I have this materialyou can see it's semi-transparent here.
And I have it in the scene.Now, you're not seeing the transparency in the scene,and that's one thing that Arnold's not showing upin the viewports.Now I'm going to go ahead and do a render of this scene.Now with the scene renderedyou can see that we've got the colorand the reflectivity and the specularity,but we don't have the transparency.And we specifically put it into our shader.Now, in order to actually get opacity into Arnoldwe need to set a switch on the geometry.
So I'm going to select my geometry.Go into my attribute editor.And under the shape nodeI should have an Arnold rollout.So it's usually the second tab inand it's the one that says Shape.And what you're looking for is the Opaque tab.Click that off.When you click that offit allows the object to be transparent.And now with opaque turned offlet's go ahead and do another render.
And here's the final render.And as he you can see we've got transparencyand we've also have a little bit of refraction, as well.So remember, when you work with opacity in Arnoldyou need to make surethat you go into the attribute editorand turn Opaque off.