Image / Batch Processing: Load Images in place of Load Image.Download 2x_MangaScaleV3.pth.
Download and open chaiNNer.
Set up the nodes as follows:
Load Image node.Load Model node.Save Image node.Click the Play button at the top to process.
Image / Batch Processing: Load Images in place of Load Image.Self-explanatory. You can roll this step into chaiNNer to automate it, but I leave it as part of the general compositing process in Photoshop.
The model may introduce gradient-like artifacts in some screentone areas. You can mask the original raw to cover them.