Light absorption test - Is it possible using Gimp?

I have just received 150 ml of Black 3.0 
... the blackest of all blacks outside of nano-tubes.

The idea is to use it for flocking a telescope, as a one stop solution.

A black paint is anyway required for blacking the lens edges
... but it might replace the need to line the scope with black material.
... also, it can cover the places where material flocking is not possible, such as inside the focus tube.
... and it can be applied to cloth.

The concept is, that stray light cannot bounce down the inside of the scope tube.
Flocking is required; so why not Black 3.0 (3.2 revision)?

YouTube Tests

The YT tests were mostly very poor.
Typically, the testers hadn't even read the instructions.
Most were artists (I guess we can forgive them), but even a photographer for business, with a highly organised setup ... no ... didn't read the instructions 
... which were: 

• Use an undercoat 
  
• mix with water 
  
• apply multiple thin coats 
  

I was going along creating layers for each pasted dot, and then one of them pasted weird where the layer has this green hue to it. When I moved the pasted image from the original, it looked the way it should but the original was left looking faded. Why did this happen?? Just wondering what I did wrong

https://imgur.com/a/mrhLC5S

1st image draws attention to the layer thumbnail weirdness. 2nd one shows how the difference between how the color should look vs. the original having become washed out

I'm trying to make an outline around a selection but the outline color isn't turning out right. It's a white dot that I want a blue outline around. I have it selected then go to edit>stroke selection yet the outline color turns into a cross between white and the blue color I want. How do I get the outline to show up as the blue I chose? 

Also, not necessary but would be convenient, is there any way to get the outline to come up beyond the selection, basically making it bigger, instead of stroking it within it?

Can someone help me restore color to my photo. I made edits to it and want the post edit color restored. Gimp will not simply let me undo.

Hello

I am new to gimp. I'm trying to use colour exchange and nothing is happening. I use the colour selector within colour exchange to select 'from' and 'to' colours (as in: https://infofreund.de/gimp-replace-color/). Absolutely nothing happens. Why is this?

I want to add length to a picture without stretching it, so I want to copy a sliver of it and add it onto the end. I figured out how to increase the width of the canvas size, but when I drag my selection to cover the now empty sliver of the canvas, it starts disappearing as it slips onto the checkered portion ("alpha channel"). How do I make it where it will show up on the checkerboard part so I can position it correctly and then fuse it (which I don't know how to do either so might as well ask too)

Hi, I’m running into an issue while using 2.10.14 where every time I color an image it displayed as gray. I can select yellow, blue etc. it still shows that layer in gray. Please help-Thank you!

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.

Hi,

I tried various avatars. 64x64, 128x128 etc. None of them gets displayed. I am on the default theme. Not that it matters, but thought of reporting.

I have several gif images that I want to combine them into one single image while
the 'product' is still a gif. The dimensions of the different single gif files are similar.
How can I do this??