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I've a set of 52 cards which all share same SimpleDeform modifier. Initially I'd applied a modifier to a single object and made 52 copies of the object. But at the end of the workflow I want to modify the deform angle of all 52 cards at once.

How to perform this operation ?

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I originally thought you were using a driver for the angle property. I don't know why I brain-farted like that. But-- you should use a driver for shared properties like this, so that's the first thing we'll do.

Create an empty. Right click in its X rotation field (for example) and select "copy as new driver."

Select one object. Right click on the angle field and select "paste as new driver."

Now test it out by rotating your empty (in the X axis.) You'll see your modifier's angle changes with the rotation of the empty.

But we want that on the rest of the objects as well. Select the rest of the objects, with the first as the active selection, and link modifiers (ctrl l -> modifiers.) The modifier on the actively selected object, including any driven values, will be copied to all selected objects.

Try rotating your empty again. You'll see that the angle changes, in unison, for all of the objects to which you copied the driven modifier.

You can drive from something other than rotation, something other than an empty, if you'd prefer. But if you want everything acting in unison, it's nice to have a single thing to animate. Frequent choices for driver targets are custom properties and bone transforms (the latter, because it vastly simplifies combining animations into single NLA strips.)

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  • $\begingroup$ alright thank you. another question is how to add the keyframe for all the objects on that property marked within the red box ? they all share the same modifier settings. $\endgroup$
    – spaul
    May 25, 2021 at 18:50
  • $\begingroup$ You know, I misread your question. I thought you were using a driver. Using a driver is a good idea. I'll edit the answer when I have some more time. $\endgroup$
    – Nathan
    May 25, 2021 at 18:56

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