Arnold transmission C4D in render is black

[Anonymous]

hi, i have a problem with transmission, i'm trying to have water droplets on a can model, do you know why is black? i turned opaque of on my droplets and have transmission set to max on my material.

[Stephen.Blair]

What are the shader settings on those droplets?
I did a quick test in Maya and I didn't get dark droplets with this clear_water standard surface:

clear_water.ass.txt

Just save the file, remove the .txt, and load it with Arnold > Materials > Import

[Anonymous]

The point is I just did a sphere and a cloner on the subdivision surface and apply on that cloner a simple standard surface with transmission set to max. In maya I don’t have that problem but in cinema 4d I have it. The weird thing is that on the top of the can the droplets are fine, they are simply transparent how suppose to be. I’m frustrated..

[lee_griggs]

It looks like it is because the drops geo are intersecting the can and therefore are refracting the dark interior of the can?

Other things to consider:

Opaque should be disabled (although this is automatically computed now).

What are the normals like?

Is transmission_ray_depth high enough?

Are the lights visible in transmission rays?

Is caustics (Advanced) enabled?

If that doesn't work, upload a simple scene somewhere.

[Stephen.Blair]

And my point is that we don't know any of your settings.

[Anonymous]

the funny thing is that the droplets on te top of the can are transparent...look ate the screenshot.

the things seems to not change even if I apply another material on the can...

[Anonymous]

ok update, the problem seems appear whenever i put a ground plane ! but why? i need a ground for my animation....cant escape from this situation...

[lee_griggs]

Upload the scene somewhere, please.

[Anonymous]

the C4D file you mean?

[Anonymous]

here the project ->>>> https://we.tl/t-xb7EK7DaBu

[lee_griggs · Accepted solution]

As I recommended earlier, you need to enable caustics for the drop shader.

[Anonymous]

i did it but nothing seems changing...

[Pham_Nhat]

Hey i have solution, you can increase specular a bit in Raydepth render setting. It's work for me