flat illustration

It is merged based on the flat illustration model that I failed to train before. Now this model is mainly suitable for displaying outdoor scenes and will perform better

If the indoor character scene is recommended to be 512*512, it is too big and easy to collapse.

After careful research today, most of the flat illustration effects can be achieved with the built-in "stylepile" style script and other models.

The following tests basically use the "DreamShaper" model