From Blender:
From Photoshop:
Lighting:
I used an HDRI from HDR Haven; something with long shadows.
I set up 2 suns to back light the bunny, matching the angle of the HDRI. Then I used Negative fill by adding Velvet BSDF to 3 Planes to intensify the shadow on the fill side.
I also set up a eye light using a cylinder and an emission shader for the fill side as well.
The Camera is set to an 85mm. I had already been playing around with DOF in cycles so I added it to the scene.
I rendered at 2000 samples which took 9.5 hours.
I brought it in to Photoshop to fix hot pixels and adjust the color a bit.
It’s still very grainy at 2000 samples. I’m not sure how to fix that. The grass isn’t as full as I’d like it to be but my machine couldn’t handle much more.