Vector Displacement Ocean with faceted specular

[CerpinTaxt]

Hi,

I am messing around with the new Boss toolkit in Maya 2017 and generated some vector displacement exr with the spectral wave solver. The displacement vray generates when set to "vector displacement (absolute)" looks fine although I am getting a facetted specular on the surface. The resolution of the displacement map as well as the tesselation of the mesh seem high enough. Any pointers what the problem might be? (maya 2017 scene file attached)

Thanks,
Jan



vray_vector_ocean.zip

[Svetlozar Draganov]

Thanks for the scene and the screenshots.
I managed to reproduce the issue and added it into our system, we'll keep you posted in case of any updates.

[Komposer]

hi,
I´m playing arround with BOSS too and found this thread and was happy to see the scene in hope to see, how you made this nice waves with boss.
But it´s only the exr rerender scene - is it possible to upload the BOSS - scene too?
I made many tests, but the nice sharp waves will not appear.
And btw..did you test the collider (stone or ship)? I can´t see any affect when I instert an collider

But now to your post.
I think, this is no prob with vray. Your spectral wave EXR, rendered out with BOSS, is simply to small in resolution.
Look at the images. When I set the tiling to 1x1 the facetts become bigger, and when I set it to 4x4 the facetts gone for narly 100%
Set Resolution X/Z to 2K or more and the render will become perfect.

chears...

[vlado]

I don't think there is any bug here. You should change the filtering of the texture to Bicubic, it should look a lot better. I will close the issue that Svetlozar created as it's just a normal result of the default bilinear filtering.

Best regards,
Vlado

[CerpinTaxt]

Thanks for having a look. Bicubic filtering does work a lot better! So is it better to avoid vector displacement maps with bilinear filtering in general or is this a special case?

I´m playing arround with BOSS too and found this thread and was happy to see the scene in hope to see, how you made this nice waves with boss.
But it´s only the exr rerender scene - is it possible to upload the BOSS - scene too?
I made many tests, but the nice sharp waves will not appear.
And btw..did you test the collider (stone or ship)? I can´t see any affect when I instert an collider

I don't think I have that scene anymore but I will have a look. The horizontal displacement checkbox/value gave me the choppiness if I rememeber correctly. I haven't touched the colliders yet.

Regards,
Jan

[vlado]

Thanks for having a look. Bicubic filtering does work a lot better! So is it better to avoid vector displacement maps with bilinear filtering in general or is this a special case?

In this particular situation the linear interpolation of the bilinear filtering is too obvious, but in most other cases it works fine.

Best regars,
Vlado