Refraction Issue

Hey all,

I have a problem when i am rendering a glass bowl with what is supposed to be yoghurt inside, but i am getting this dark edge on the top as you can see in the attached image. is there a way to solve it inside Vray? or do i have to adjust the mesh?

Thanks a lot

Would it be possible to attach stripped down version of the scene for investigation?
Is this grass single or double sided?
Have you checked for overlapping geometry into that area?

I will provide you with both meshes later today .. thanks for the reply