Glass Vase Render Problem

[xWh0Datx]

Hi all, I am a long time fan but new member here. I saw a vase on Luxology and decided to model something like it. My problem is when I render. I get a black bottom to the vase where it seems like there is no light. I am using mental ray and lighting the scene with a skylight hdri image, FG and no GI or caustics. Does anyone have any input as to why I am getting these results? See attachments.

[Macer]

Have a read though this:

http://www.mrmaterials.com/jeffs-blog/67-fix-the-black-edges-on-your-glass-material-and-other-stuff.html

 

Hopefully this will sort your problem?

[xWh0Datx]

Much appreciated Macer... I had not seen this before. Apparently I stumbled across a fix last night along the same lines. I jacked the max depth up to 50 for reflection and refraction. I also cleaned up my model as there were lots of tris at the base. Either bad geometry or too little refl/refr depth was my problem if not both!