Lighting from the Sky texture may be quite bright or dark depending on the time of day. The new Sky texture is an improved version of the Nishita single scattering sky model, and it accounts for altitude change as well as ozone absorption. Especially on the GPU this is slower than previous primitives. This gives higher quality than any of the previous primitives, but does come at a performance cost.

This automatically subdivides the curve until it is smooth. 3D Curve: render hair as 3D curve, for accurate results when viewing hair close up.There may be artifacts when viewed closed up. This gives relatively accurate results, especially when used with the Principled Hair BSDF and hair viewed from a typical distance. Hair curves are subdivided with a fixed number of user specified subdivisions. Rounded Ribbon: render hair as flat ribbon with (fake) rounded normals, for fast rendering.Hair curves are rendered differently due to the switch to Embree. Apple dropped support for CUDA drivers in macOS 10.14, and no recent Apple hardware uses NVIDIA graphics cards. NVIDIA GPU rendering on macOS is no longer supported.When enabled in the Cycles device preferences, GPUs connected with an NVLink bridge will share memory to support rendering bigger scenes. OptiX is now available on all NVIDIA GPUs that support it, which is Maxwell or higher (GeForce 700, 800, 900, 1000 series).Other scenes with high geometric complexity also benefit on average, depending on the scene contents. This significantly improves performance in scenes with motion blur.

Intel Embree is now used for ray tracing on the CPU.

Denoising blender 2.9