Exporting without anti-aliasing on outside?

I have some Isometric vector blocks in Illustrator that need to line up perfectly. Anti alias looks great but then I get visible edges when overlapping the blocks. Without anti alias they line up perfectly without a visible grid, it still looks ok but kind-of jaggy on the high contrast area’s. Is there a way I can anti alias my image only on the inside and leave the outside “jagged”?

I have tried this technique in 3Ds Max with good results but building all my blocks in 3Ds Max is tedious to let all the edges have a 2:1 ratio.

The picture below illustrates what I mean. The top two blocks are offset from each other in the exact same way as the bottom two blocks but if you look closely you see a line running on top between the two blocks. This is because of the anti alias transparency.

This line is minimal mostly because it’s a light surface on darker surfaces it is more pronounced since the “mix” of colors will produce a much darker line.

enter image description here


If you use the Save for Web... option from the file menu, choose to save as a GIF and then set the Matte to None then you will get the anti aliasing on the internals of the shape, but not at the edges. The background will still be transparent as long as you have that option ticked.

This has the potential to make the edges of your block look jaggy (like they do in the bottom half of your example image), but it will avoid the semi transparent anti aliasing problem that you are getting where the blocks join.

Source : Link , Question Author : Madmenyo , Answer Author : Westside

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