Sergey Sharybin f01c4f27f9 Fix Cycles speed regression after dynamic volume stack change
Only copy required part of volume stack instead of entire stack.

Solves time regression introduced by D12759 and avoids need in
implementing volume stack calculation to exactly match what the
path tracing will do (as well as potentially makes scenes with
a lot of volumes ans a tiny bit of deeply nested ones render
faster).

Still need to look into memory aspect of the regression, but
that is for separate patch.

Ref T92014

Maniphest Tasks: T92014

Differential Revision: https://developer.blender.org/D12790
2021-10-08 15:44:03 +02:00
2021-03-26 16:15:02 +01:00
2021-08-11 10:11:11 +10:00

.. Keep this document short & concise,
   linking to external resources instead of including content in-line.
   See 'release/text/readme.html' for the end user read-me.


Blender
=======

Blender is the free and open source 3D creation suite.
It supports the entirety of the 3D pipeline-modeling, rigging, animation, simulation, rendering, compositing,
motion tracking and video editing.

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   :scale: 50 %
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Blender as a whole is licensed under the GNU General Public License, Version 3.
Individual files may have a different, but compatible license.

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