Duplicating Surfaces and Re-surfacing

I’m wondering if there are any commands that perform these functions (duplicating a surface and resurfacing) that I’ve overlooked. I’m currently making several steps to achieve my goal, but my process feels wrong. Here are the steps I’m taking now, perhaps there’s a quicker way to perform them with the same result:

Duplicating a Surface:

  1. Extract Surface from Solid
  2. Copy and Paste
  3. Join the extracted surface back to the original solid to close it.

Resurfacing a solid (for planar surfaces):
Note: Sometimes I’ll decide to extend a solid or surface, and the subcurves of the original surface still show, which is annoying if I decide to alter it another way afterward, like extrude it in the other direction or fillet it.

  1. Extract the Surfaces from Solid and Delete.
  2. Cap Planar Holes.

Perhaps your better method for resurfacing would help with the non-planar surfaces as well, but I’ve only really wanted to resurface planar surfaces, and by capping them I don’t have any issues with closing my solids.

Thanks in Advance,


When you extract surfaces, have the option to copy them in the command line, to avoid exploding and rejoining surfaces.

For resurfacing planar surfaces you cant try with mergeFace doing it by pairs or MergeAllFaces to the entire solid once.

Thank you!! That was exactly what I was looking for, 2 out of 2!

My only disappointment is that the Merge Faces Command was only for Coplanar surfaces, and not for edge-less, joined surfaces. Take for example, after extruding one of the planar faces of a cylinder, you’ll have 2 curved surfaces, instead of the 1 that is obvious to us. Is there a command to merge those 2 surfaces, or would we have to remake the cylinder/surface from scratch?

for non planar surfaces you can try with MergeSrf but I would recommend to rebuild them manually instead of merging.

for simple tasks like extend a cilynder, have you tried moving faces? like selecting faces or edges with Crtl + Shift + Left clk ?

No, that’s a new one for me! That will def help in the future! Unfortunately it looks like you have to have the CPlane set up for direction beforehand (relocating the gumball seems to work too, but it switches back immediately after use).

once the face or edge is selected you can use the traditional move, scale or rotate commands from any reference point not just the gumball