Yup, it's 3d! I really love the effect too. It's 3d voxel art with a low-res shader on top.
It's all open source: https://github.com/CloneDeath/MidnightDrive
In summary, I made a new canvas layer with a large white colored rect, and attached a shader (Pixelize.shader under the Effects folder) to sample the texture underneath at a lower resolution.
Let me know if you have any questions.