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I need to animate a multi step change in a mesh like this

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I set a shape key for the base and then step 2 fine but when I used new shape key from mix it applied the transformation for both step 2 and 3.

enter image description here

How can I get the shape key to only apply changes from step 2 to 3 and not from 1 to 3?

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1 Answer 1

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If you add two shape keys without the new shape key from mix option, you can animate them separately. It is Important is that you keyframe the 2nd part of the animation with influence 0 for the duration of the first part. This way the 2nd part does not start before it is supposed to do.

enter image description here

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Editing the shape for extrusion: In Edit Mode a loopcut is added at the top of the extruded cube to create the geometry required for the second part of the animation.

enter image description here

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  • $\begingroup$ Is it possible to start editing the 3rd shape key starting with the mesh from the 2nd? On yours both keys are modifications of the base shape $\endgroup$
    – Qwertie
    Commented Mar 9, 2015 at 7:48
  • $\begingroup$ Sorry but I don't get what you mean. $\endgroup$
    – stacker
    Commented Mar 9, 2015 at 7:52
  • $\begingroup$ for example if I wanted to extrude from the top end of the part that sticks out I could not do that starting from the default cube because that part of the mesh does not exist yet. $\endgroup$
    – Qwertie
    Commented Mar 9, 2015 at 7:56
  • $\begingroup$ @Qwertie Now I got it. I simply extruded the top face of the default cube and added a loop cut to create the face which is extruded to the left side. The shape keys work always on a single mesh. Added an image to clarify this. $\endgroup$
    – stacker
    Commented Mar 9, 2015 at 8:11

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