It all depends what your work in Krita entails.  
You can stretch a layer in Krita by painting outside the canvas. (I suppose similar to the Gimp 3 Expand Layer option in the paint tools)
   
That is imported back into Gimp (using psd format) with the increased layer size. You can trim with a layer to canvas size.
   
definitely packing in for the day now.
	
	
	
You can stretch a layer in Krita by painting outside the canvas. (I suppose similar to the Gimp 3 Expand Layer option in the paint tools)
That is imported back into Gimp (using psd format) with the increased layer size. You can trim with a layer to canvas size.
definitely packing in for the day now.

