Drop Shadow effect causes dotted line

[k8tywork]

Hey everyone. 

I have a curious problem. 

I gave my vector the drop shadow effect and since then, dotted grey lines are crossing my graphic. As they are no paths or something, I can't delete them and they don't disappear - not even when I export or save it as a .png/.jpeg!

I don't know if it has anything to do with that but I rotated (3D Filter) my vectors and than gave the drop shadow. 

[Monika Gause]

The 3D might have caused this. Can you show your layers panel? Please show the contents of the layer, not just the layer. You can also try if it gets better when you View > Preview on CPU

[k8tywork]

Hello, thank you for your answer. And you are right: Through the CPU Preview the lines are lighter, but unfortunately not gone.

My main language is not english but I translated the words...

I only grouped my mockup and then added the 3D Rotation on the whole grouped mockup - I have  to group it because otherwise the elements won't fit together. So the group is having the Effect 3D.

But only the elements on the right: blue container and every "card" has the drop shadow effect. 

[Ares Hovhannesyan]

Capture from Appearance panel also would be helpful. Thanks

[k8tywork]

Hello, thank you for your answer. 

My main language is not english but I translated the words...

I only grouped my mockup and then added the 3D Rotation on the whole grouped mockup - I have  to group it because otherwise the elements won't fit together. So the group is having the Effect 3D.

But only the elements on the right: blue container and every "card" has the drop shadow effect. 

[meganchi]

Does is print out that way? It could be a screen redraw issue.

[k8tywork]

Oh could be, because it doesnt' come out like this of the printer. But when I save or export the graphic, it looks like this.. There are even more lines, but white ones ??? But only, when you click on the picture ... Don't get it

[Monika Gause · Accepted solution]

The trouble is that the (raster based) drop shadow effect is mixed with vector artwork and then distorted in 3D space. The edges of the raster image get anti-aliased. 

To have this clean, you would need to do the following:

make the 3D distortion without shadows or make it with rectangles instead of shadows.

Then expand the appearace (Aussehen umwandeln) and apply gaussian blur to the rectangles so they look like shadows.

[k8tywork]

Thank you so much for your answer and explanation! very interesting ...
I already thought that I'd have to choose one effect, either 3D or shadows - but both together don't work. It's a great tip using blurred rectangles instead of shadows. Will do so, this will solve my problem!
Thx and greetings from Austria