Wondering why some of your faced turned green in sculpt mode while using Blender?
Well here are both of the quick and easy ways to fix it.
I made a quick example of the random green faces in Blender. It should look very similar to your issue, however you may be seeing a different, random color or perhaps some darker colored faces as well (the darker faces are due to your actual sculpting/masking).
The first solution is disabling the feature creating this issue entirely — this won’t break your mesh, don’t worry!
Go ahead and click on the Viewport Overlays dropdown beside your x-ray button in the top right, and uncheck the Face Sets toggle button
Sweet! That’s all you really need to do, but if you’d prefer to leave the feature on and remove the face sets themselves — keep reading!
For this solution, whilst still in sculpt mode, head up to the top left, hover over Face Sets, and select Face Set from Visible
That should remove the face sets themselves and get rid of those green faces! There’s the green faces fix in blender!