PBR tests - Default Surface Model

PBR render tests

All renders here have :
an Environment light with the same HDR map
an additional spot for shadow casting (Raytrace unless otherwise specified)
1 Diffuse Bounces allowed

Defualt Surface Shading Model

Mantra > Properties > Pixel Samples:

Magnifications of the same renders.

from left to right:

3x3 (default)
2x2
1x1
0x0 (no samples)

Diffuse Bounce Limit [0,1,2]

Reflection Bounce Limit [1,2,3,10]