Amazfit Watch faces

Does anyone know how to make a watch face for GTR 2 so that when loading a BIN file to the watch, its preview appears, not a black watch face?
With some dials, when I load them to the watch, I have a preview, and with others, no preview. I don't know the reason.
Does anyone have any suggestions on this?

Do you have the correct file 0001.png as preview in all cases set at 306x306 pixels?

Yes, I have pos. 0001 PNG file with a resolution of 306x306 pixels and no preview, but not on the watch face, but in the watch face loader, that is in "Notify for Amazfit". With this smartphone program (Android) I load watch faces. Sometimes I have a preview, not once, and I don't know what it depends on.

I also do not know if you can somehow automatically generate a GIF from the design of the watch face. I have all the PNG files, the "json" file, BIN but I just have the watch face as a static PNG 306x306 and 454x454.

Hello my friend!

At the moment it's not possible to auto-generate gif's.

I use Sacha's Watchface editor for GTR47 because of the same size of the dials. I do all the .json editing by hand to produce the GTR2 bin. For the animated previews I do a lot of manual tinkering by putting all GTR2 png's inside Sasha's tool, renaming everything to match the 47 and basically re-doing most of the work again. Just to produce the gif might take the same amount of time spent to create the actual wf.

Since Huami's tool is reaaaaaally bad we need a proper editor for the GTR2 to come along to make it easier for us and we can concentrate on making new stuff instead of finding sideways to do all work.

I completely agree. I also "sculpt" similarly when creating watch faces for the GTR 2. But I don't have time to tediously create GIF files for this watch model.
Thanks for the answer.

Does anyone have an idea how to preview the watch face being loaded into the "Notify for Amazfit" application? Sometimes I have a view (but rarely). More often I have no view but only a black background of the watch face.
I would be grateful for suggestions on this.

I also almost always get black background. I would say 99% of the time...