This grass material(vismat)looks photorealistic in material editor but render is not

[Sherm]

I used default presets of vray (exterior highquality) But still the rendering looks totally different than material editor preview.

Can someone give some feed back what I'm doing wrong? why is that doesn't appear as preview after the render where it should (not photo realistic as preview)? And that sphere's diameter is about 1 foot. I use adaptive DMC as image sampler type. and why that sphere's surface is not perfectly round? it has edges as you can see.


Following is the preview from the website I downloaded it.




and this is what it looks like in my Vray material editor




and this is what it looks like after I render it

[Nearl]

Your displacement is off. Check that.

[peerman]

Assign the material to a group. So select your ball, create a group and give this group the grass material.

Regards,