Available in 3ds Max 2011 and higher.
<adsk_Utility_Bump>.Multiplier : float
<adsk_Utility_Bump>.Map : filename
<adsk_Utility_Bump>.Image_Frame_Number : integer
<adsk_Utility_Bump>.Multiplier_connected : boolean
<adsk_Utility_Bump>.Multiplier_shader : texturemap
<adsk_Utility_Bump>.Multiplier_paramName : string
<adsk_Utility_Bump>.Map_connected : boolean
<adsk_Utility_Bump>.Map_shader : texturemap
<adsk_Utility_Bump>.Map_paramName : string
<adsk_Utility_Bump>.TheList : maxObject array
<adsk_Utility_Bump>.Shader_Version : integer