Transparency

[dayna_beaver]

Hello, have been playing around with this for a little while now, but haven't been able to get any results. What am I don't wrong?

The first image is the look I'm trying to achieve, but I can't figure out how to make the green portion transparent. I'm just trying to get the top of the glass to have a green tint.
- I got it this far by using a blend material.
- Glass is my base, Green is my coat and a gradient ramp is my blend... no dice

This is just a glass texture with a fog color added. The green transparency is what I'm trying to achieve in the first image.

Haven't been able to figure out the method to achieve this. Would I mask out the fog with a gradient? If so, how!? Or, is there a way to do this with blend material? If so, how!? Any help would be very much appreciated.

[bardo]

Something like this?

[hermit.crab]

Try using a VRayScatterVolume as your base blend shader.

[dayna_beaver]

Yup, something closer to that Bardo, but no green at the base.

I'll test out vrayscattervolume too,

Thanks!

[bardo]

Yup, something closer to that Bardo, but no green at the base.

I'll test out vrayscattervolume too,

Thanks!

Well...but that green at the base is due by the refraction and it depends on refraction index and glass shape.
For example...same material...different glass mesh at the base



EDIT: Or you could map the refraction channel, the opacity channel or/and the IOR channel to control refractions on the base.

[fixeighted]

I must be having a real stupid moment because I cannot get that to work using scattervolume. It works fine using standard mapped fog.
Please hermit.crab explain how you achieved the split using the blended scatter approach

[hermit.crab]

I must be having a real stupid moment because I cannot get that to work using scattervolume. It works fine using standard mapped fog.
Please hermit.crab explain how you achieved the split using the blended scatter approach

My bad, I suggested it without a proper test. It doesn't seem to do the trick.

[fixeighted]

Ah ok, thx for the update....thought I was having a proper 'senior moment' there for a sec

[dayna_beaver]

So what did you do to achieve that result Bardo? I've tried a few different things, but still can't get it looking like yours!

[fixeighted]

Here you go...simplest setup

[bardo]

So what did you do to achieve that result Bardo? I've tried a few different things, but still can't get it looking like yours!

Sorry for the late reply.

Here my setup (more or less the same as fixeighted )
colored_glass.zip

[dayna_beaver]

Thanks for sharing your setups guys, much appreciated! Even after following and replicating your setup, my geometry still reacts differently...? I've re-made the materials, geo, lighting, angles... but no matter what I do, when looking straight on, the glass always appears clear when it should be green...

[bardo]

Uhmmm...I think that it will be hard to have an homogeneus coloring as the fog depends by how depth the rays have to run inside a closed geometry.
I've tried a mixed approach adding a coat to the glass.
You'll find as attached.
As you can see, if you watch the glass from top to down, the thinner part of my glass become more transparent, but the coat helps to recover a bit of coloring.
At the moment it's my fastest way trying to solve your questions.
colored_glass_2.zip

[fixeighted]

dayna_beaver the best option would be to post your scene in that case. It's a simple setup so it should just work....maybe there is some parameter in your version that is screwing with things.

[dayna_beaver]

The fog color is changing my exposure? The more I tint it, the more over exposed the scene gets? I've also had issues with identical materials giving different results when they should be the same... Has that happened to anyone else? This program is gas lighting me!



Thanks for all your input, really appreciate it!