I have a big cube made of smaller cubes, but sometimes, due to the fact that each side of the cube has different colors, I get some ugly colored lines that I would like to get rid off. Any advice is appreciated.
EDIT: The BLACK lines and arrows are part of a texture, they are not relevant to my question, the focus is the RED line in the first picture and the red dots in the second picture. The lines appear mostly because this cube is made of smaller cubes put together side by side, so, depending on camera orientation, the side of a cube gets drawn on top of the front of the neighbouring cube.
EDIT: The solution, at least for now, was to "delete" all faces that are not visible, this, for obvious reasons, eliminated the problem, but I am going to leave this question open in case someone comes up with a solution that does not involve hiding faces.