Why am I getting black and white images after I export an image that is full color

[GoddessAthena]

Hello, computer terminology is a weakness, so please forgive any errors.

I have been using Gimp for years. I just installed the new version 3.0.0-1. I opened an .xcf file that I had used in an older version (2.10.28). After making some changes to the file, I exported a .png image - it seemed to work fine, creating an image of 4.23 mb with dimensions 2048 x 2048 pixels. I made more changes and exported 7 more .png images. These images, however, did not export correctly. They went to black and white. creating an image of between 170 and 178 kb with a dimension of 1024x1024. I tried to reexport them, clicking the "reset to default" option on the exporting pop-up. Same problem occurred. I closed Gimp and reopened it. Same issue.  I am stuck.

On a related note: I have noticed that the new version of Gimp puts any pasted item into its own layer instead of allowing me to paste it onto the layer I am working on. How do I fix that?

I have attached a picture of the two images.

Thanks for any assistance!

[Ofnuts]

Looks like you exported the layer mask (hard to guess better since you uploaded images that are 166px high...).

You can still paste as a floating selection, this is somewhere in the menus. You can also merge down the created layer. The floating selection is for the most part a legacy from times when RAM was scarce. These days you keep layers as much as possible.

[henry_albrecht]

Hi

I have the same problem. With the current version (3.0.2) i loaded images as layers.
All looks as expected. Then I saved the project as an xcf-file. After reloading all
images are black/white.

[GoddessAthena]

(03-28-2025, 12:47 AM)Ofnuts Wrote: Looks like you exported the layer mask (hard to guess better since you uploaded images that are 166px high...).

You can still paste as a floating selection, this is somewhere in the menus. You can also merge down the created layer. The floating selection is for the most part a legacy from times when RAM was scarce. These days you keep layers as much as possible.

Let me send you the actual images, if that will help. I will attach them one at a time as they are large.

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(03-29-2025, 02:54 PM)GoddessAthena Wrote:

(03-28-2025, 12:47 AM)Ofnuts Wrote: Looks like you exported the layer mask (hard to guess better since you uploaded images that are 166px high...).

You can still paste as a floating selection, this is somewhere in the menus. You can also merge down the created layer. The floating selection is for the most part a legacy from times when RAM was scarce. These days you keep layers as much as possible.

Let me send you the actual images, if that will help. I will attach them one at a time as they are large.

[Ofnuts]

The image you attached is 600x600, and not 1024 by 1024 as announced? But then I would be interested in the XCF (you can use the strongest compression, that should put it under the allowed 2MB. Otherwise, crop it to 512x512 and check that you can still reproduce the problem at that size before attaching it here.