Gimp users

[gonzostar]

Hi

I am having to use GIMP  at the moment. Following on from advice Could anyone tell me how to merge layers on to your "final image" 

I have being told to make different layer of background colour with no image on it and then slightly blur it and add merge on to the image???

Have i got the wrong end off the stick again?

 

Ta

Dean  

[wimvb]

Hi,

 

I'm not sure if this is what you mean, but:

I fyou have at least two layers in your image:

In the layer pane, set the appropriate blend Mode (standard is "Normal", but there is a pull down menu)

Then in the Layer menu (main window), select Merge Down.

This will blend the active layer with the layer below, using the mode specified

 

Hope this helps

[gonzostar]

Thanks will give it a try.

As you mentioned before still gathering lots of light frames, but moon is faily full at moment though!

[dph1nm]

If you are blending many layers using "Normal" then you need to set the opacity of the nth layer to 1/n (in percent), as GIMP doesn't have an 'average' blend mode.

So the top layer has 100% then you set subsequent layers as follows

50%, 33.3%, 25%, 20%, 16.67% etc etc

Mathematically you end up with the same as if you had done an average.

NigelM

 

[gonzostar]

Thanks Nigel. Would i be better off then just doing the setting as average?

[wimvb]

On ‎2016‎-‎02‎-‎19 at 14:46, dph1nm said:

If you are blending many layers using "Normal" then you need to set the opacity of the nth layer to 1/n (in percent), as GIMP doesn't have an 'average' blend mode.

So the top layer has 100% then you set subsequent layers as follows

50%, 33.3%, 25%, 20%, 16.67% etc etc

Mathematically you end up with the same as if you had done an average.

NigelM

 

Nigel, shouldn't this be the other way around?

If I set the top layer 100 % opacity, this means I can't see the layers underneath at all.

I tested with this:

1st (bottom) layer 100% filled with red only

2nd layer 50% filled with green only

3rd (top) layer 33% filled with blue only.

Blended using "Normal" gave me a mid-gray image, as expected.

Setting top layer 100% opacity, resulted in a blue image (lower layers don't show at all).

(Note that none of my layers had an alpha channel.)

 

 

[dph1nm]

17 minutes ago, wimvb said:

Nigel, shouldn't this be the other way around?

Oh sorry - by "top" layer I mean the first one you put in (called Background by default I think). Subsequent layers are then set to 1/n.

NigelM

[gonzostar]

 I am way behind you guys. I will just follow your lead and hope for the best