How are stream priorities set?
Stream priorities are assigned as User Defined properties in the external modeling package used to create the W3D file. In 3D Studio MAX, this is achieved by selecting a model, then right-clicking in the active viewport. Select Properties from the menu that appears. In the Properties dialog box, click the User Defined tab to access a field into which you can enter text. To set a model’s stream priority, enter the following in the editable field: sw3d_stream_priority = M; where M is the integer value you want to assign as the model’s stream priority. All textures that are used by this model are by default assigned a stream priority value of 4xM. If a model resource object is used by more than one model, the lowest stream priority of those models is used to determine the loading order of the model resource object. To set the value of a texture’s stream priority manually, you could enter the following into the User Defined properties for a model using the texture: sw3d_texture_stream_prio