A render question

[Bobo]

Is it possible to halt a render using a callback? If so, what would be the proceedure?

thanks in advance.

Don't think so. I think the only way is to handle the Esc. key, but I don't think you can use a callback. Once you start rendering, you can either wait until the render is finished, or let the user cancel it using Esc.
I might be wrong though.

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