So for attributes the spacing between indexes is vec4, so if I had 2 matrix as an attribute, they'd be layout (location = 0) in mat4 a and layout (location = 4) in mat4 b
If I did the same for 2 uniform matix, what would the index of matrix b be?
Side note: with OpenGL 4, are VBOs also attributes, there isn't a key word for vertex?