Is there a way to blur a part of a layer by another layer?

[barkasfarkas]

Hi there,

I'm going to describe the problem specifically.

I'm making T-shirt designs using two layers.

Layer 1: a template with different colours and designs for various T-shirt types.
Layer 2: a generic layer with creases and other details to make Layer 1 look like a real T-shirt.

Sometimes the design on Layer 1 is a bit jaggy. So what would I like to do?
I'd like to create a new layer (Layer 3) that I does some anti-aliasing (most likely by burring certain areas) on Layer 1.

So my Layers panel would look like this:

Layer 3 (transparent layer with blur effect)
Layer 2 (the template which makes the T-shirts look like real - 30% semi transparent in multiplying mode)
Layer 1 (T-shirts in various colours and designs)


I've been loving GIMP for 15 years now, and Googled a lot for an answer, but I still have no idea if this is possible.
I could do the anti-aliasing on each T-shirts on Layer 1, but it would be time consuming and not standardized at all.

[rich2005]

Quote:...snip...
Layer 3 (transparent layer with blur effect)
Layer 2 (the template which makes the T-shirts look like real - 30% semi transparent in multiplying mode)
Layer 1 (T-shirts in various colours and designs)....snip.

No replies?

Obviously you cannot blur a transparent layer. Nothing to blur.

The way is really to adjust your jaggy logo before planting it in your template.

Then it depends on your template. You duplicate a layer, blur it, add a black layer mask (fully transparent), paint in the layer mask with white to expose the blurred areas.

Maybe something like: https://i.imgur.com/bhRi0SN.jpg