@Lucasuk
You better leave it for another day
What the video shows
The map layer
The map layer with the canvas size increased using Image -> Canvas Size giving transparent borders
edit: check that Resize layers: = All layers and Fill with: = Transparency
A new layer for the displacement map. This is the same size as the canvas.
A displacement map created / painted in / blurred as necessary. The painted area is larger than the flag but it does not matter, the layers are the same size.
The displacement map applied.
Did you...
Set the displacement map in both inputs (one is for horizontal displacement, the other for vertical)
Break the link between horizontal slider and vertical slider
Adjust each slider.
You better leave it for another day
What the video shows
The map layer
The map layer with the canvas size increased using Image -> Canvas Size giving transparent borders
edit: check that Resize layers: = All layers and Fill with: = Transparency
A new layer for the displacement map. This is the same size as the canvas.
A displacement map created / painted in / blurred as necessary. The painted area is larger than the flag but it does not matter, the layers are the same size.
The displacement map applied.
Did you...
Set the displacement map in both inputs (one is for horizontal displacement, the other for vertical)
Break the link between horizontal slider and vertical slider
Adjust each slider.