Ocean simulation -Refraction problem black line

[gustavo_ribeiro]

Hi Guys!

I am doing a ocean scene and when i am shading the splash simulation this dark line appears. Its comming from the refraction but i dont know why.

I already checked the simulated geometry and it is ok. Do you have any idea how to fix this?

[waaazoo]

what do you have below the water surface ? You could try also to raise the off screen margin to see if it makes any change.

[fixeighted]

My guess from seeing this in other images is that it's a shadow bias thing. Lower that and it should go away