HELP Missing pixels large sea with patches of Oceans

[tricecold]

I am working on a sequence for a movie, we will have large sea scenes for both close up and far,

I made my sea with 3 zones and each zone has 3 layers of ocean deformer. and Every patch has its own displacement with different quality levels.

Studio is in process of switching to Houdini, so we decided to make an 1km by 1km sea which we can use for most of the shots.

There were several issues I would like to point out,

1) I could not render my ocean unless i have ray predicing set to Full predicing, I beleive i set the displacement values correct i get 0.1 - 0.11 amount of displacement and i got the bounds set to 0.2

with Full predicing I am able to render, is this a general issue

2) I have black spots empty pixels in RGB not in alpha, they are not the result of intersecting edges so I may be seeing something under but they are black empty. Maybe occuring where there is more specular.

I am using Micropoly PBR

PBR renders pixels also but seems to be less

Pixel Samples rendered at 6 for the uploaded image

but making it 12 doesnt seem to fix it

Missing pixels appear randonly every render for the same frame

Thanks in advance

I am unable to upload the scene but uploaded some renders

[Nerox]

For the black pixels you can try to play with the values on the PBR tab of the Mantra ROP. The max color value helps to get rid of these kind of artifacts.

[tricecold]

Thanks for the tip, will give it a try, Although, i have improvement, tip came from rendering department, I was using blackman as filtering, box or Gaussian also seems to help the situation.