i figured out how to draw the 3d effect cubes, but now im facing the issue of the border lines extending beyond the points where they meet. i know that by doing "draw=none" i can turn these off, but i prefer the borders. is there an obvious fix for this? (also, I have seen rounded corners, but I'm not wanting to go this route either)
Here's the code:
\documentclass[border=.5cm]{standalone}
\usepackage{xcolor}
\usepackage{tikz}
\usetikzlibrary{positioning}
\begin{document}
\pagecolor{black}
\begin{tikzpicture}[on grid, font=\sffamily, line width=.2mm]
\draw[draw=white, fill=blue!65, yslant=-0.5] (5,5) rectangle (6,6);
\draw[draw=white, fill=blue!95, yslant=0.5] (6,-1) rectangle (7,-0);
\draw[draw=white, fill=blue!45, yslant=0.5, xslant=-1] (6,0) rectangle (7,1);
\end{tikzpicture}
\end{document}

Also, here's a screen grab of the problem (it happens on other corners too):