Vertex Map Opacity

[table-state]

Hi there,

I couldn‘t find anything about this specific problem so I hope it‘s okay that I post this.

I set up a scene where a glass is dissolving after going up in smoke.
The opacity in the material is driven by an animated vertex map.

This works super great, unfortunately the reflections/refractions are still visible.

Is there something I can do to fully dissolve them?

You can find the file here, it was too big for the upload here.

https://www.dropbox.com/scl/fi/2z985f56qr644z4nugi5g/vertex-problem-reflections.c4d?rlkey=47khdrw2h303c4gld4zyp2lib&dl=0

Thanks a lot in advance

[Dr. Sassi]

Hi table-state,

Thank you very much for the file and using Dropbox.

I couldn't see the images (max height 500 pixels)

Please have a look here:

https://stcineversityprod02.blob.core.windows.net/$web/Cineversity_Forum_Support/2024_PROJECTS_DRS/20240410_CV4_2024_drs_24_RSvr_01.c4d.zip

Is that the result you are after?

My best wishes for your project

[table-state]

Hi there,

Thanks a ton for your quick reply and solution! Very appreciated, that's what I was looking for.
May I ask what your approach was?

I figured it out myself, in the glass material setup the vertex map goes trough a ramp. I just clamped it a bit and that did the trick!

BUT, another problem still exist, unfortunately with your file also. If I want to render caustics it still shows all of the glass model.

Do you have another idea what might be causing this?

Thanks so much

[table-state]

This post is deleted!

[Dr. Sassi]

Hi table-state,

I have not found a single-render solution. The Caustic shows up as long as the entire geometry is in the scene.

I have attached a two-step version, which means you have one Caustic Path that needs to be added in a compositing session.
But this is kind of a hack, as I set the IOR to zero, which kills the Caustic via the Vertex Map growth.

Edit: upload replaced /edit
https://stcineversityprod02.blob.core.windows.net/$web/Cineversity_Forum_Support/2024_PROJECTS_DRS/20240410_CV4_2024_drs_24_RSnc_01.c4d.zip

I have animated the Vertex map via a Linear Field; please move the time slider.

Other than that, perhaps place the Glass object into a Volume/mesher and "boole" it. (It's Not Ideal; I get that.)

All the best

[table-state]

Thank you so much,

Amazing how fast and helpful you are.

Unfortunately, I can't download the file you attached.

Have a nice day and thanks again.

[Dr. Sassi]

Hi table-state,

Thank you for the kind feedback.

Please test the file from above, which I have problems downloading myself (That is the first one with the current forum). Sorry about this. I will try this
https://stcineversityprod02.blob.core.windows.net/$web/Cineversity_Forum_Support/2024_PROJECTS_DRS/20240410_CV4_2024_drs_24_RSnc_01.c4d.zip

Please test this, as I had mixed results with your file.

The problem with Cautics is that the material has no option to stop it, so any Blend via Vertex didn't wasn't working. It is tricky.

Cheers