Opacity maps

I am rendering a exterior scene with a lot of trees with opacity maps.
The 1.46.12.70 version takes three times more to render than “r” version.

It´s a new bug?

:frowning:

Have you tried this on either 1.46.13.70 or 1.46.14.70? there were a few bug fixes in the .13 release that .12 had issues with…

-dave