Practical Application

Build a selective model-upscaling branch:

1. Generate a 512 by 512 image so the difference is easy to inspect.
2. Preview the decoded original image.
3. Add Upscale Image Using Model.
4. Add Upscale Model Loader and select 4x-UltraSharp or RealESRGAN x4.
5. Connect the decoded image to the upscaler.
6. Add a second Preview Image node after the upscaler.
7. Queue the workflow and compare the original and enlarged outputs.

For manual gating:

1. Mute the first node in the upscaling branch with Ctrl+M.
2. Set the KSampler seed control to Fixed.
3. Queue the initial generation.
4. Inspect the preview.
5. If the image should continue, unmute the branch and queue again.
6. Confirm that execution resumes at the upscaling stage rather than creating a different candidate.

For batch selection:

1. Install the Image Chooser custom node.
2. Increase batch size to four.
3. Send the decoded images to Preview Chooser.
4. Select the preferred image and keep the selection count at one, or increase it when multiple images should proceed.
5. Choose Progress Selected Image.
6. Send the chooser output to the model-based upscaler.