Hi. I have a simple shader line gl_Position = u_MVPMatrix *(u_InverseBindMatrix) *(a_Position); I have u_inversebindmatrix set to Identity matrix using Matrix.setidentityM(); If I render without the line *u_InverseBindMatrix, then my cube shows up. If I leave it in, however, nothing shows up. I thought the identity matrix left equations unchanged. Any ideas?