Outer Shadow looks different on export (Grey line)

[affinityUser2918]

I have a square in a very light grey with an outer shadow also in a very light grey and a distance of 50px. 

In Affinity Designer the square looks how I want it to look (Screenshot 1, its hard to see but you can see it better in Screenshot 2),

but when I export it, the outer shadow turns into a single grey pixel line (Screenshot 2)

The picture has a resolution of 1050 x 400 px.

Anyone an idea why that happens? The exported file is not really useable with that grey outer line...

[Old Bruce]

Hi and welcome to the forums @affinityUser2918,

What sort of export? Could you check and see if there is a stroke applied to the Rectangle. What is the blend mode for the layer and are there any other layers in the document?

[affinityUser2918]

Hi @Old Bruce

There are a lot of layers in this document, however I use the export persona and only exported the layer of this particular square-layer (the square is a single layer) as a png. 

There is no stroke and the blend mode is set to "Normal"... The square is converted to curves, but that shouldn't affect the shadow I think?

[thomaso]

I do see an outline occur while adjusting shadow properties – but I can't reproduce it in an exported PNG. Neither as shape object nor curve, neither as bilinear nor bicubic export. – Can you upload an Affinity document containing this layer + your PNG as embedded image?

[affinityUser2918]

Ok, thanks @thomaso for trying to replicate, but I found the problem. It actually wasn't in Affinity Designer but in the program where I used the exported png (Unity).

There seems to be a problem with importing the alpha of the shadow. I didn´t find a working solution yet but I´ll transfer the question to another forum as it is not an Affinity Designer problem anymore.

Thanks for helping!