Humm,

From the manual:

Quote:


Video memory is automatically preallocated for entities placed in the current level, but not for entities that are created during gameplay through ent_create...





As far i can understand you cant use it with ent_create.

Probably, you can attach an action to each entity placed in the level assigning a pointer to it. Then in main function and before level load you may use ent_preload to preallocatte video memory...