How do I put three pictures(1920*1080 each) in one picture(in 3 parts)?

[IndianAgent47]

Hi everyone. I downloaded GIMP a week ago. I want to make a thumbnail for my YouTube video, where 3 pictures of 1920*1080 resolution are put in three equal parts in a 1920*1080 picture. I want them to be divided by three slashes (/) rather than a straight line. Thanks!

[Blighty]

(10-21-2017, 08:01 PM)IndianAgent47 Wrote: Hi everyone. I downloaded GIMP a week ago. I want to make a thumbnail for my YouTube video, where 3 pictures of 1920*1080 resolution are put in three equal parts in a 1920*1080 picture. I want them to be divided by three slashes (/) rather than a straight line. Thanks!

Use (File > Open As Layers) to open your 3 images. You will get 1 image with 3 layers, one image per layer.

On the two top layers, Right Click on the layer and Add Layer Mask. Use White (full opacity).

In the layers dialogue, select one of the layer masks. ie click on the layer mask next to the image thumbnail.

Use one of the selection tools and select the portion of that image that you want to be transparent. Bucket fill it with black to make it transparent.

Do the same for the next layer mask.

See the image below, noting the layer masks and black areas.

[IndianAgent47]

[attach ment=846 Wrote:Blighty pid='3642' dateline='1508620242']    

(10-21-2017, 08:01 PM)IndianAgent47 Wrote: Hi everyone. I downloaded GIMP a week ago. I want to make a thumbnail for my YouTube video, where 3 pictures of 1920*1080 resolution are put in three equal parts in a 1920*1080 picture. I want them to be divided by three slashes (/) rather than a straight line. Thanks!

Use (File > Open As Layers) to open your 3 images. You will get 1 image with 3 layers, one image per layer.

On the two top layers, Right Click on the layer and Add Layer Mask. Use White (full opacity).

In the layers dialogue, select one of the layer masks. ie click on the layer mask next to the image thumbnail.

Use one of the selection tools and select the portion of that image that you want to be transparent. Bucket fill it with black to make it transparent.

Do the same for the next layer mask.

See the image below, noting the layer masks and black areas.

Thanks a lot for the reply! But when I open up my 3 images with the open in layers option only one image is displayed:

And after that  when I right click on the image there is no layer mask option Help please!

[rich2005]

You create a layer mask in Layer -> Mask -> Add Layer Mask

Layers masks in Gimp are really useful so look in the gimp docs on use

https://docs.gimp.org/en/gimp-dialogs-st...layer-mask

Either the layer mask or the (image) layer can be active, important you know the difference. Click on the icon to make active, a white border indicates it is active.

For your three layers.

Make a black layer mask (full transparency) for each of the top 2 layers.screenshot https://i.imgur.com/1qaFdrw.jpg

In the second layer make a selection. https://i.imgur.com/wDsgBia.jpg

Fill the selection with white. https://i.imgur.com/TWUAExs.jpg

Move up to the next layer, make sure the mask is active, make a smaller selection, fill with white https://i.imgur.com/AS09SPc.jpg

Save your work as a Gimp .xcf file which saves all layers, masks, etc. When happy with the outcome that is the time to Export to a png / jpeg / tiff ...

[Ofnuts]

Open the Layers list, you should see your three images. Of course, since at that point the top image is opaque it masks off the images under it.

[IndianAgent47]

Thanks a lot for the replies! But I'd there a way to make the three images equal?

[Blighty]

(10-22-2017, 07:45 PM)IndianAgent47 Wrote: Thanks a lot for the replies! But I'd there a way to make the three images equal?

Sorry, I'm not understanding. What do you mean by make them equal? Aren't they all 1920*1080?

[IndianAgent47]

(10-22-2017, 07:53 PM)Blighty Wrote:

(10-22-2017, 07:45 PM)IndianAgent47 Wrote: Thanks a lot for the replies! But I'd there a way to make the three images equal?

Sorry, I'm not understanding. What do you mean by make them equal? Aren't they all 1920*1080?

Yup they are but the part to put into the picture is selected free hand, so I was wondering if there was a way to select equal parts of all the three images

[Blighty]

(10-23-2017, 04:14 AM)IndianAgent47 Wrote: Yup they are but the part to put into the picture is selected free hand, so I was wondering if there was a way to select equal parts of all the three images

Put in guides at the correct places.

Assuming you want a slight angle on the portions:
1980/3 = 640
Put in guides at (640-100) and (640+100)
etc

Switch on (View > Snap to Guides) and (View > Snap to Canvas Edges)

Use the Free Select Tool to make your selections.

Looks like this:

[rich2005]

The topic is a really good one for a basic demo, so a video in the tips section

https://www.gimp-forum.net/Thread-Three-Layers-in-One