message: larger volume-cell bounding-sphere radius
diff: import { VolumeData, VolumeIsoValue } from './data';
  import { OrderedSet } from '../../mol-data/int';
  import { Sphere3D } from '../../mol-math/geometry';
  -import { Vec3 } from '../../mol-math/linear-algebra';
  +import { Vec3, Mat4 } from '../../mol-math/linear-algebra';
  import { BoundaryHelper } from '../../mol-math/geometry/boundary-helper';
  export namespace Volume {
  @@ -86,7 +86,8 @@ export namespace Volume {
  boundaryHelper.radiusPosition(tmpBoundaryPos);
  }
  - return boundaryHelper.getSphere(boundingSphere);
  + const bs = boundaryHelper.getSphere(boundingSphere);
  + return Sphere3D.expand(bs, bs, Mat4.getMaxScaleOnAxis(transform) * 10);
  }
  }
  }
  \ No newline at end of file
  