New issue 822: volume rendering classes are not imported in yt/__init__.py https://bitbucket.org/yt_analysis/yt/issue/822/volume-rendering-classes-are-...
Nathan Goldbaum:
Currently only off_axis_projection
is imported. We should probably import
ColorTransferFunction
, TransferFunctionHelper
, and any other
names that people used to commonly import from yt.mods
.