While creating various circular masks with a radial gradient from white to black, whenever I change the blending mode of the mask path Ai will throw me out of mask mode into layer editing mode. Since this is on a large document of ~2Gb file with multiple artbords for large poster & UI refresh speed is slow, this has become quite frustrating.
Is this normal Ai behaviour?
I wanted to use multiply mode so as the mask paths are overlayed they just hide portions of the selected placed image.
I would expect Illustrator to stay in mask edit mode, and not exit each time I change transparency from Normal to Multiply for any mask path.
An opacity mask uses just the greyscale information taken from the an object or image as a mask. Just like layer masks in Photoshop.
This stuff cannot at the same time multiply. If you want to also multiply it, you need a second object (a copy of the paths you used as mask).