   texbem pixel shader instruction
  Just a question about the 'texbem' pixel shader instruction.It performs the next operation:text(n)texbem  t(m),  t(n) where m > nu' = Tex. Coord(stage m)u + D3DTSS_BUMPENVMAT00(stage m)*t(n)R + D3DTSS_BUMPENVMAT10(stage m)*t(n)G  v' = Tex. Coord(stage m)v + D3DTSS_BUMPENVMAT01(stage m)*t(n)R + D3DTSS_BUMPENVMAT11(stage m)*t(n)Gt(m)RGBA = TextureSample(stage m) using (u',v') as coordinates.So, if we set 0.0f to all D3DTSS_BUMPENVMAT* states, the next code fragments should be equivalent:code 1:----------------tex   t0texbem t1, t0mov   r0, t1code 2:----------------tex   t0tex   t1mov   r0, t1But they're not!!Anyone could tell me WHY?Thanks in advance.[edited by - arco75 on February 17, 2004 5:25:01 AM]