I was trying to equally divide the surface of the twisted massing by using Tween Through Surfaces (to get the result like the image), but the the resulted tween lines aren’t following the intended massing; even if I changed the selected list item of the surfaces to make them match the massing, the tween line direction isn’t the one I wanted ( not sure if I am making sense here). Does anyone know why this is it? Is it because I twisted the surfaces too much?
I’d also tried Iso Curve the Brep surfaces ( I broke down the polysurfaces to individual surfaces first), but even if I set the UV number the same, the division points are matching along the joint edge.
@inno Thank you again for helping me out again.
I tried to set another surface for it, but the same problem occurred, could you help me look at it again? Also, may I ask what role FLIP plays here?
I also tried Tween through Curves, but would like to know how to flip the direction of those tween lines. twist_test.gh (20.7 KB) fork_test.3dm (244.7 KB)
the flipping was there to unify the direction of all the curves, otherwise you would get points in the opposite order (see the 4 vectors, 2 of them are traveling in opposite direction)
Last but not least if you right click on the Brep Parameter in choose “Internalize data”, it will store the Geometry of your Brep inside the GH file, so there’s no need anymore to also attach the Rhino file will save you some time
if you right click on the Brep Parameter in choose “Internalize data”, it will store the Geometry of your Brep inside the GH file, so there’s no need anymore to also attach the Rhino file 
will save you some time