Convex perforated shape geometry with rounded corners

Hi! Could anybody help me with how to do such a perforated shape geometry image (look the

)? Just can’t guess which of plugin should I use to get the needed result.

See this: Drawing a bent perforated steel sheet

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Ok. I saw this tutorial before. But what if I want to make such a shape to be perforated with for example circles (a cube with rounded corners). How can I create this? If it is not difficult for you could you post a step by step GIF tutorial?