If specified, the surface should contain the specified number of MIP levels. If this element is not present, it is assumed that all miplevels exist until a dimension becomes 1 texel. To create a surface that has only one level of mip maps (mip=0), set this to 1. If the value is 0, the result is the same as if mip_levels was unspecified, that is, all possible mip_levels will exist.

public int mip_levels

Public mip_levels As Integer