New issue 1309: passing in a data object to OffAxisProjectionDummyDataSource https://bitbucket.org/yt_analysis/yt/issues/1309/passing-in-a-data-object-to Hui Li: Currently, OffAxisProjection can only analyze all_data() object. Would you please add a feature so that we can have the freedom to pass any 3D data object to this function as a "data_source" argument.