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Many users struggle when having to deal with out-of-canvas areas of nested masks, including inherent masks in adjustments / filters. The issues are less a technical bug, and more a kind of missing help / tutorial / functions-for-remedy thing. But the issue reports pile up in the forum where user have fallen into this trap, and correcting these mistake re-actively is quite laborious. Out-of-canvas areas typically start by rotating, copy/pasting, resizing layers having nested masks. Normally, you start with an "white" mask, and remove unwanted parts. If you reverse the parent layer rotation, the mask is fine. But if you invert the mask (or start with a black mask on MacOS), things become messy once you rotate the parent layer or mask again. The region from the mask which was out-of-canvas defaults to white - this is unwanted / unexpected. It would help if the "extension mode" for mask can be set manually (or automatically). If you apply fill or gradient fill to a mask layer while it is still rotated, extension of a mask will happen automatically (in theory, there are open issues). Steps to reproduce: New document create a pixel layer with gradient from black to mid red (all colors below 50% lightness) rotate pixel layer by 20° crate a nested invert layer (positive) Use erase brush to remove part of the mask deactivate invert layer "positive" create nested invert layer "negative" invert adjustment layer use brush with white to paint in something rotate pixel layer back to 0° activate positive / negative mask and see the difference regarding former out-of-canvas areas. crate nested invert layer "filled by fill tool" (while parent layer is rotated) fill with black use erase brush to remove a part rotate back parent layer Request Basically, affinity "works as designed" (invert layer). But this "as designed" often leads to unexpected / unwanted results, which are hard or next to impossible for normal users to correct. I miss a way to manually control the "layer extension" behavior, especially for rotated mask layers Potential Remedy In Channels Panel, provide new functions to accompany existing fill/invert/clear (proactively usage) "fill & extend" "invert & extend" "clear & extend" In Channels Panel, provide new functions to accompany existing fill/invert/clear (re-active usage to repair) "restore alpha extension with black" "restore alpha extension with white" "invert alpha extension area" The function should "recover" the missing extension area, and fill the area having wrong fill color by desired fill color (mostly black). It should use the rotation angle and original layer size to calculate which area got harmed, and impact only this area. Alternatively, provide a manual restore/recover function: Based on a rectangular shape which is manually aligned to to shape of the parent layer / mask, it should correct the area outside that rectangle (fill with black) Positive mask: Negative Mask: In case mask was filled with fill tool (instead of "invert") rotated mask bug.afphoto

MacOs BigSur, Metal computing off. When linking to mask layers pixel data, it is sometimes became rotated and shifted. Expected content on both layer to be exactly the same after linking See video, afphoto (used in video) also attached Screen_Recording_2021-03-24_at_14_29_20.mov LinkShiftingBug.afphoto