[libgdx] 3d anaglyph with 2D texture

Newbie & Debugging Questions
#1

Ok, so I have a voxel engine and each voxel contains an x,y, and z value for position. However, each voxel is not a 3d model and is only 3d in the sense that I am adding the z value to the y value to give the illusion of depth. How would I make it so that I can render these voxels in red : cyan 3d with the y and the z (the 2 depth coords) values as my depth.

voxel cubes right now:

(Sorry if this question is badly worded)

#2

Anyone? Is there any way of doing this? Ok how about this: Is the there any way where I can render two overlapping images without them blending or overpowering each other?