I've made a vase which has 2 handles. The handles were created separately so I wanted to join them and used CtrlJ to do so, with the intention to then trim the unneeded vertexes.

But as I join all in a single mesh there's a change in color, like it's no longer being lit properly. What's causing this and how can I fix it?

Left is Joined Right is not

Left Joined, right not joined

  • 2
    $\begingroup$ Possible duplicate of Why are some faces in my mesh darker? $\endgroup$ Commented Nov 12, 2018 at 12:25
  • 1
    $\begingroup$ In most cases this happens when one of joined objects had inverted (negative) scale, just in case for future handling with meshes. $\endgroup$
    – Mr Zak
    Commented Nov 12, 2018 at 14:54

1 Answer 1


That's a normals problem. You need to flip normals.

Select the whole mesh in edit mode, then go to mesh, normals, and recalculate outside.

Refer to this: enter image description here

  • $\begingroup$ Thanks that solved it now I can work on the inside of the vase! $\endgroup$
    – Mira
    Commented Nov 12, 2018 at 4:43

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