Alpaca respects selections. Instead of generating AI art on your background layer, create a new empty layer. Make a rough selection, generate, and then use a layer mask to blend the edges with your brush tool. AI edges are often too sharp; blurring them manually creates realism.
This is arguably the most popular feature. It takes a rough drawing and "renders" it into a polished style. alpaca photoshop plugin
Alpaca offers two "engines":
Pro Tip: For professional retouching, use the cloud for speed. For experimenting with thousands of variations, set up the local engine. Alpaca respects selections