I converted a raster image to vector in Illustrator CS6 using Image Trace then the Expand option, though when I save as an svg the image looks embossed. I suspect it's due to the layer background being white and the paths not lining up, but I'm unsure how to fix it or prove that theory without ma...

I am very new to this world of graphics design. I have noticed that some drawing look 3D but I have no clue what's making them perceived like that. For example how can I turn a circle to look like a sphere, etc. As an example, why does the left drawing look flat but the right one looks 3D? Could...