DeepDream is not a GAN. So just want to clarify it first. The one sold for half a million in Christie is GAN, not DeepDream. So it is a very different topic and likely you need to train the model with pictures (a lot of pictures) provided by you.

I don’t have a good answer on the tools with the configurability that you prefer. But if you search “neural style transfer online”, there are a few options.

For developers, they may just start with some code available online.

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