{w, a, s, d, space, c, shift} to Move

{click and drag} to Rotate around

{q, e, r, f} to Rotate directional light

{i, o} to increase or decrease the brightness of the directional light

{n} to toggle render face normal

{t} to toggle render face tangent, bitangent

{m} to toggle normal mapping enabled

{l} to toggle lighting

{b} to toggle render skybox

{Esc} to Pause