fog + water surface

[klex167]

Hi everyone,

I have a simple underwater scene as you see in the first picture.
The camera is placed beneath a plane with a water material. The plane you are looking at has a deformer to get the (simple) waves. The normals are pointing upwards.
So this looks as expected.

But if you turn on the environment fog - to get more depth to the scene - the surface disappears and you look into the sky.
Is this an issue? Can you give me a tipp how to render the water and fog together? For now I turn the plane around so the normals are pointing down but this doesnt look good.

Scene is attached.
Best - klex

[sirio76]

Reverse the water surface normals, then it should work.
You can also try using the aerial perspective.

[klex167]

Hi Sirio,
as I already wrote this is my workaround right now but this looks not as expected:



Oh I didn't know that aerial perspective is implemented already (I was waiting for a long time). I will give a try.
Thanks

[sirio76]

The aerial perspective is in the latest build. Try this in the mean while, using your original setup you can put your camera inside a sphere with reverse normals:

[klex167]

Nice idea with the sphere around the camera. Its is working in my simple test scene with a perfect refraction. But if the refraction glossiness is lower then 1 the image is getting blurry. Also with an additional bump map this is tricky.
So If I have a komplex material for the water and a simple glass material for the sphere the water is gone again. It seems that this must be the same material for the water and the sphere to see the water. I hope this is not too confusing!

You proposed the use of aerial perspective but I got the same issues as with the fog.

[klex167]

Hi chaos-team, no response on this issue?

[aleksandar.kasabov]

Hello klex167,

Apologies for the delayed reply.

This seems to be a bug that only happens when rendering with V-Ray but is not reproducible if rendering with V-Ray GPU. I have reported this to our developers (bug ID: VC4D-1259) and I will let you know once we have any updates.

[boyan]

Hey, klex167,

Could please enable the "Refract Thin Walled" option available in the Refraction menu as well and check if it works for you.

Cheers,

[klex167]

Hi Boyan,
unfortunately the water is (almost) gone again with the "refract thin walled" option. Even without the fog.

[klex167]

Hey guys, are there any updates on this issue?
I have to cope with this almost every day and my customers are pretty unhappy.

Best - klex

[aleksandar.kasabov]

Hello klex167,

I am afraid that we don't have any updates yet. I have additionally boosted the priority of the issue and I will let you know as soon as we have any updates. Thank you.