[OT] clever use of mask

[Bob Sneidar]

I should point out, (and forgive me if this was obvious) that the graphic is not 3D. It's two masked images going by in different directions, but on the left and right there is no "wrapping" so to speak. 

Bob S


> On Dec 30, 2015, at 15:24 , Geoff Canyon <gcanyon at gmail.com> wrote:
> 
> On Wed, Dec 30, 2015 at 4:03 PM, Richmond <richmondmathewson at gmail.com>
> wrote:
> 
>> I wonder why stuff like that is not more accessible?
>> 
> 
> ​Same here. I wish I had seen this back when I was fooling around with a 3D
> space simulation. I was having some trouble getting the general rendering
> correct, and despaired of being able to do anything reasonable in terms of
> rendering a globe, and abandoned it. I never thought simply scrolling a
> flat image horizontally within a circular mask would work so well.
> 
> Which leads to the next question of course: Scott -- any thoughts on ho​w
> to make this scroll in two dimensions? To present a simulation of a real
> globe I'd need to be able to scroll up and down, left and right,
> diagonally, etc.
> 
> I'm not being able to picture how that would work in my head -- maybe an
> image that contains the whole "surface" of the globe twice over? Then,
> setting the angle of the image and scrolling appropriately might work?
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