Hi basj, monitor size had nothing to do with it
Only screen resolution is important.
I confirm the bug mentionned by TomTheBadAssCat For multiple screen, a background image must be set in Windows [Mosaik] mode. This mode is missing from DeskScapes.
I provide test image for 1980x1080 monitor resolution :
2 screen: 3840x1080
3 screen: 5760x1080
Here how it look using Windows Mosaik mode : Picture Using Mosaik
Here how it look using DeskScape mode : Picture using DeskScapes
The fix for this would be to cut your large (multiple monitor) picture in 1920x1080 image and apply each image on each separate screen
However, there is others bug involved with DeskScape when we want to use this solution
Bug #1: Screen label in DeskScapes are wrong. DeskScapes name the primary monitor Screen #1 faultly.
According to Microsoft, Screen number should be labeled according to Setting order as seen here:
Screen Order Example
as you can see I have 4 monitors labeled 1 through 4 (well, 4 is an hdmi output on a video card and I use it for recording, there is no physical monitor attached to it)
But when I use DeskScape, monitor 2 is named 2, but monitor 3 is named 1.
If I deactivate monitor 1, monitor 2 become 1 but in deskscape, it is still 2 because for deskscape
3 will always be 1
Left is always 2
Right is always 3
Wich is VERY confusing when you have Multiple Screen profile like I does (Screen 1 is not always there and I also have a Screen 5 that is also not always there, it depend of my recording need for streaming)
Image starting with a number doesn't always appear in deskscapes
as an example, look at this: Missing numbered images
There is 3 missing image in deskscapes compared to the directory box you can see
This one kind of puzzle me because I'm a programmer myself and I have no idea how they can achieve that kind of bug.
to my knowledge, there is no way to apply a directory filter that filter out "some" number.
They probably list images in a [list object] and forget (for some reason) to retrieve all files in the list.
But it seem to be a problem mainly with PNG file.
Ok, this one, Stardock will call it a feature, but let me tell you, this feature make applying Effect EXTREMELY difficult on multiple screen.
If you apply your picture separately on each monitor, you need to apply effect ALSO separately because when you go to apply effect,
only the LAST background image applied appear.
Meaning you have to process this way and only this way
1. Apply Monitor 2 (left one) Background image
2. Apply Monitor 2 Effect
3. Apply Monitor 1 (main) Background image
4. Apply Monitor 1 Effect
5. Apply Monitor 3 (right one) Background image
6. Apply Monitor 3 Effect
and if someday you want to change some effect, you still have to re-apply the background image prior to change the effect.
Clear effect button cannot be used when applying multiple background image to different monitor