fill masked area is actually smaller than the input mask about comfyui-inpaint-nodes HOT 2 CLOSED

You always get the fill where the mask is perfectly white. Outside of the area there is optional blending according to the falloff parameter.

So there is no shrinking, and negative falloff doesn't make sense. What you're seeing is that your mask has some smoothing and mask areas that aren't 100% white are not filled. This is intentional, to avoid any grey areas getting less than 100% denoise strength (it results in color skew and visible borders).

Using mask grow is a solution, or make sure your mask fully covers the area (without blur!) in the first place.

from comfyui-inpaint-nodes.

Ok, thanks for your reply. This is reasonable. I'll take a look and optimize the pre-steps.

from comfyui-inpaint-nodes.