>>937237262
Before we go into any other setup it's important to get your settings right. So we're going to go over each setting on the SAMDetector node.
Detection Hint - This is what tells the SAM Detector where to look for an idea of what needs to be masked. You should set this to mask-area for our purposes since you're trying to only alter what you've masked over.
Dilation - The expands the mask but we only want to do that a small amount after the Detector has finished, so I generally leave it at 1.
Threshold and Mask_Hint_Threshold - These decide whether or not an individual pixel should be added to the mask. The threshold is essentially how sure the detector needs to be before it adds it, and the mask_hint_threshold is how closesly the detector is trying to mask the pixels in the original image. Keep these high and adjust them carefully
BBox_expansion - This tells the Detector how much outside of the mask it should look at for more parts to draw. I keep this low because I don't want it searching the whole image for similar colors.
Mask_Hint_Use_Negative - This is for drawing Negative or exclusion masks. I don't find it useful in this workflow so I keep it set to False.