Hi all. I'm very inexperienced at coding, but I'm doing a project where I have hundreds of layers, and I need opacity for all set to 10. Instead of adjusting the slider for each single layer, I'd like a script to do it all at once.

I figure it's possible, I just don't know how to do it.

Thanks!

Here, toss this in your gimp's scripts folder

It'll be available under Script-Fu/Set All Layers Opacity...

It only has one option (opacity).





update: I just changed the script to accept floats instead of just integers so you can have like 10.5 as opacity.

Note that if you want to obtain an average of all layers where all layers participate equally, the answer is not to give them the same opacity, but instead to give the Nth layer an opacity of 1/N (with layer #1 being at the bottom, and fully opaque).

offnuts mentioned a really good point.
I could've used a script like this when i was doing average images with multiple layers.
so here's one that won't accept a user input, it'll just set the n-th layer to have opacity of (1/n) * 100 opacity.

Hi Finbar: Just curious - what's the use case for 100's of layers, all with partial opacity?

I'm essentially doing an average of a bunch of simple photos.

Thanks everyone! This will work perfectly!