Reference/Release Notes/2.91/More Features

= Blender 2.91: More Features =

UV/Image Editor

 * Alpha blending are now done in Linear Scene Reference Space.
 * Support of pure emissive colors.
 * Improved performance; especially noticeable when viewing render results and repeating image.
 * The smoothness of the UV's can now be controlled in the User preferences

Sequencer
The FFmpeg library is now compiled with vectorization (SSE/AVX/AVX2) support enabled, allowing for faster video decoding and encoding. In the tests re-encoding 3405 2560x1376 frames on Xeon E5-2699 V4 CPU overall time down from 313 seconds to 210 seconds (sample file).

Motion tracking

 * Implemented Brown-Conrady distortion model, improving compatibility with other software

Shaders

 * Add Emission Strength to Principled BSDF shader, as a multiplier to the Emission color.

Cycles

 * Motion blur rendering from Alembic files.
 * Overriding the compute device from the command line.
 * NVIDIA RTX 30xx graphics cards support without runtime compilation.
 * For AMD graphics cards, the latest Pro drivers must be installed. These contain critical fixes for Cycles OpenCL rendering to work.