So, P2D isn't implemented yet but my program runs abysmally slow using Java2D.  I found P3D speeds things right back up.  However, I also noticed that the default projection/perspective screws things up a bit.

Specifically, my program shows an image and then draws rect()'s over the top of the image corresponding to specific pixels.  When the image is draw stretched to about 8x its normal size (and thus the rect()'s are also drawn larger,) the rect()'s do not line up with the pixels they're supposed to correspond to - rect()'s are always shifted in towards the center of the window relative to the image.

Even more specifically, I noticed the outside rows of pixels in the image are cropped - my rect()'s seem to line up perfectly where they should be.

I thought maybe using an orthographic view might fix this, but putting a simple call to ortho() in my setup() just broke everything.  Maybe I'm doing something wrong?  Can anyone help?  I'm not a real expert on 3D projections.