Is it possible to create conditional options for PF_ commands?

For instance, I have various scripts where a selection is saved to a channel for future use. What I would like to be able to do is give the user the option, at the start, as to whether the selection is re-instated after the plug-in is run, but not appear if a selection is not present.

At the moment this is a hypothetical question, but the answer may be helpful to other people.

I have a number of hi-res (600 dpi) images that contain transparency. I want to create a montage of these images but when I copy and paste the original images into the montage base image (which has a transparency channel) the alpha channel is not copied and the transparency is lost.

This not a Windows 10 or 11 issue - the same thing happens in Linux (Fedora 37) as well. Even more confusing is that using the sequence Edit->Paste as->New Image produces a perfect copy with the transparency intact, which would indicate that the image is not altered by the copying process, but something is happening during the paste process.

This is of some urgency as I need to publish this montage ASAP.

Is there a solution in GIMP - or do I need to look elsewhere?

Okay, so this has happened to me a few times. Recently, I used the paths tool to target a woman's hair in an image to swap colors and change the hair color. I spent maybe 10-15 minutes meticulously placing anchors to place a selection by paths so I'd only make changes to the hair. I feel comfortable with all the work I put in and then mistakingly select "Rotate Colors" before selecting "to paths." I realize my error when all the colors in the image are changing instead of what I...failed to click select>from path. I back out and all of my 100+ anchors are now gone and all that work lost.

My question is, is there an option to undo this somewhere? To undo my blunder and save the 100+ carefully placed anchors that I just lost?

With both the heal and clone tools I can't set a source. The message says ' Ctrl-Click to set a new source' but this does not work. I'm using Linux Mint 21.2 Cinnamon.

We do all this work to enhance our pictures but then have to take them somewhere for prints. Can someone recommend a reasonable priced home printer for quality pictures?

Thanks in advanced

I imported 30+ PNG files of a fireball output from the fun TimelineFX tool.

I did the import as layers option.

I've tried with and without filter animation blending.

When I do filter animation playback, the edges of the animation coming from the separate fireball layers which have alpha transparency...

bleed solid orange all around the circumference.

This seems very strange. I did the "replace" option for each image/layer in the playback and it still does it.
My expectation for the animation is that the tiny particles at the edges would disappear layer to layer as it was being displayed, giving the effect of fluid fire particles.

Thoughts?

In the past I've taken sequences of images like that and animated like in JavaFX and it was smooth and accurate.

I would just use the GIF that can be output from TimelineFX but it is just a little bit slow with no way of adjusting.
So I wanted to create a GIF using Gimp.
I'm using 2.10.34

I was toying around, then I got some delirium tremens ...
the luminescent snail was AI generated (not mine)
Yeah... I know.... my ego is overwhelming me

   

Credit to @PixLab for teaching me Liquid Rescale, a useful editing tool indeed:






Here, I'd like to stretch out this character's lower torso as shown without messing up the pic, how do I do so using either Liquid Rescale, or any simpler alternatives?

https://ibb.co/WWyz3z1

Credit to @PixLab for teaching me Liquid Rescale, as per his tutorial:

https://www.youtube.com/watch?v=WFT1cnZomLM

Now, how do I use Liquid rescale (or any easier alternative methods) to stretch image sections at an angle? Here, I'd like to stretch this character's lower torso as shown out longer, but without messing up the image in any way.

https://ibb.co/WWyz3z1

Hello
Is it possible to create a brush that can pick up 2 colors at a time, allowing a line in which the 2 colors appear separate or mixed in places, depending on the structure of the brush bristles - in fact, exactly as in oil painting?
Such a brush may already exist, but I'm not familiar with it.
Thank you for your advice
sincerely
Denis