IanSG

If you just stack the images AP doesn't know what you want to remove - have a look at this video.

You'll have to apply the profiles after you've used Luminar, but AP can't be used as a plugin. I've no idea whether there are plans to change that.

I'm not sure what you're asking. AP can be used as an external editor, but there are problems if it was bought in the MS Store. It can still be done, but the sandbox environment has to be dealt with.

If you use File / Open (but, annoyingly, not Open recent) you can browse through thumbnails of your RAW files- aren't you seeing them, or do you want to browse through full screen versions of the images? AP uses the OS' native file manager, so if it's the former you'll need to add a codec to handle it. If it's the latter, have a look at Fast RAW Viewer - it's not free, but it's a useful tool to have.

I've just had a look at LibRaw's News page - " CR3 support is expected in next public snapshot this Fall". I've no idea how long it takes to include a new snaphot, and "expected" sounds a note of caution, but at least things are moving in the right direction.

Unfortunately, the only thing to do at the moment is wait! RAW support is provided by LibRaw, which can't yet handle CR3. There's a new release due out in a few weeks and there are mutterings that this will be the one to finaly support it.

In the Develop Persona, go to View / Studio / 32-bit Preview. Check that the exposure and gamma values haven't been set too low, and that the display transform is ICC Display Transform.

I'm not sure if this is what you're looking for, but.... Let's assume you want to cut a dog shape out of the background. You have 2 layers - the background layer and the layer with the dog. Use the selection brush to select the dog, refine as necessary, and then untick the dog layer (making it invisible) and select the background layer - the selection will be applied to that layer and you can delete it or change it as you wish. You can use the Move tool to reposition and or resize the selection if you need to.

Hi John Thanks for that! I was too focused on the idea that frequency = Hz, and I'd forgotten that the "abundance" is affected by the radius slider, so that didn't make sense either!

It works on Windows, too!

Both frequency separation and high pass filtering involve separating the high and low frequency data in an image, but what are they measuring the frequency of? I understand that low frequency equates to things like tonality, while high frequency catches the detail, but I don't know what those nice sine waves that are supposed to explain things are actually showing - it's spatial separation along one axis, but what's the other?

I don't know the answer to this, but it would help to know which of the Affinity programs you've bought, where you bought it, and which platform you're trying to run it on.

The op's problem was that aphoto files didn't display - raw images were ok. Installing the MS extension is a solution to a different problem

AP saves files in its own format and is supplied with a codec to handle it - the MS extension isn't involved.

I've found the brush size makes a difference to the way the refine selection works - in your example I'd start with a large brush and paint in all of the tree. You can also use a non-contiguous flood select, and try working with individual colour channels to see if you can get better contrast. I haven't tried this myself, but maybe convert to black & white and then tweak the colour sliders to get the best contrast - once you've got your selection you can revert to colour.