OTOY Forums

Hi guys,

I just got a problem in octane 2020 2.3 R6 and try to post it here to see if anyone had the same issue before.

I created a simple specular material with a Scattering Medium on it, and I apply this mat on a plane as a water surface, the problem is if I put any object intersect with the plane/water there will be weird white outine line around the object showing in the render as attached.

I did some test and turns out the emission inside the Scattering node caused the problem, but I don't want to turn the emission off because I need the water to be glowing.

So here is the question: Why the emission giving the weird outline and how to keep the water glowing but remove it?

Thanks

Hi,
why the object is black, and what happens if you remove the scattering and keep only the Emission?
Please post a screenshot of the desired result, thanks.

ciao Beppe

bepeg4d wrote:Hi,
why the object is black, and what happens if you remove the scattering and keep only the Emission?
Please post a screenshot of the desired result, thanks.

ciao Beppe

Thanks for the reply.

I did couple of tests and attached each result here.
I disconnect the scatter and absorption node the line is still there just not that glowing.
Also I tried to adjust the Ray epsilon cause I thought it's probably caused by the intersection between objects and it does work! The width of the outline will decrease if i set the Ray epsilon as a really tiny value, but it's still visible in a close distance, so it's not a perfect solution I guess.

All results are attached below

Thanks

Sorry, I cannot reproduce the issue: Do you mind to share the scene with me, even via Private Message?

ciao Beppe

bepeg4d wrote:Sorry, I cannot reproduce the issue:

51DD9853-98BF-4CDD-B7F1-CD538AB8DC78.jpeg

Do you mind to share the scene with me, even via Private Message?

ciao Beppe

I think you need to apply the specular mat on the floor/ or a plane, and any other diffuse mat on the sphere. Then you should see the problem, there will be a glow outline appearing on the intersection area.

If it still not showing please let me know and I will send you an example.

Thanks

Ok, if you have two intersecting Specular materials, try to disable the Nested Dielectric option in Kernel panel, or change rthe priority in the Common tab to one of the two Specular materials, and report back, thanks.

ciao
Beppe

bepeg4d wrote:Ok, if you have two intersecting Specular materials, try to disable the Nested Dielectric option in Kernel panel, or change rthe priority in the Common tab to one of the two Specular materials, and report back, thanks.

ciao
Beppe

Hi Beppe,

No I didn't use two specular materials, there is only one using on the plane. Please have a look at my example projects which is attached. Thanks for your time.