Hello again! I've spent some time evaluating Affinity Paint and gone through a fairly long list of features I use a lot on Photoshop, and been really pleased that pretty much everything I need is present in AP, often in a superior form, so I'll definitely be buying the software.
I've spotted a couple of minor issues, which I'll mention here for the benefit of any other PS users looking to make the switch, and I have a couple of questions about features I can't find. I'm sure I'll have more questions as I use it more.
The main problem I've found when importing PS files is the slightly different way AP handles adjustment layers and layer effects. While AP matches PS in terms of all the actual layer types and effects, I find that they're calculated slightly differently in AP, and there are slightly fewer control options for layer effects. This means that when I load in one of my existing PSD files created in PS, they don't look identical. (I mainly make video game graphics and comic strips, so I tend to make heavy use of layers with graphicy-looking glow effects, shadows, adjustment layers for shading, etc.) I guess a lot of the calculations in PS for exactly how 'outer glow' and 'brightness / contrast' etc. work are done fairly idiosyncratically, and you're not able to duplicate them exactly, AP might even be calculating them in a better way. It's not a problem when creating new work, but does mean it's slightly awkward for me if I need to go back to an existing graphic I've created, alter it a little, and re-export it, which is something I probably will have to do from time to time. Not a showstopper by any means, but something PS users might need to be aware of.
Also, I'm not convinced the all the blend modes are working exactly as they should in AP. For example, if I create a new layer with an 'outer glow' effect, say red in colour, and set that to use 'add' blend mode, this red glow should be visible against a dark background, but should have no effect against a pure white background. 'Add' should only make things lighter, and you can't make white any lighter, but in AF this produces a red glow against a solid white background.
Two little things I cannot find:
When transforming a selection, there doesn't seem to be any display anywhere of the scale as a percentage value if I'm scaling. I can see the new pixel value of the scaled selection as a tool tip, and I can edit the target scale size in pixels in the Transform window (which are both great), but I would love to both see and edit these values as % as well. I regularly have to make selections 10% bigger or 5% smaller, or whatever, so being able to do this without having to perform a pixel calculation in my head would be a big help.
There does not seem to be a quick way to duplicate a layer from one open document to another. This is a feature I use many times a day in PS. I tend to have multiple documents open and regularly need to copy layers from one doc to another. In PS the right click / duplicate option on a layer brings up a dialogue to both alter the copied layer's name, and select the target document (from the ones open), whereas in AP the option just duplicates the layer in the current document. I can copy and paste the layer manually from one document to another, but that's a few clicks more, so this feature would be a neat time saver.
It does feel as if the software is developed primarily in the 'docked' mode for viewing documents, which I guess is perfect when editing photos. I tend to use the float mode as in video games I'm working on lots of separate pieces of images (textures, references, etc.) which I need scattered around the screen. Switching into float mode feels a bit unfinished, as documents aren't centred properly in their windows (I need to manually scroll them around to see their contents), and I can't drag selections from one floating window to another. Not massive issues, but slight niggles to do with the feel of using the software, and the number of clicks needed for regular operations.
Anyway, generally the software seems pretty great, and I look forward to using it more.