Hi guys, I transform my model like this: D3DXMATRIXA16 mRotation; D3DXMatrixRotationY(&mRotation,angle); D3DXMATRIXA16 mTranslation; D3DXMatrixTranslation(&mTranslation,...); D3DXMatrixMultiply(&worldMatrix,&mRotation,&mTranslation); ...but it doesn't rotate my vertex normals. Is that the way it's supposed to be ? I can transform them right in my vertex shader, is that the normal way of doing things ? Thanks.

In your vertex shader you want to multiply your normal by the rotational portion of your world matrix. The easiest way being to cast your world matrix to a 3x3 matrix. Multiply your normal by the 3x3, then renormalize the normal. This isn't a perfect solution but should work for the most part.