**''[OT:''** ''[[picturename|<PictureName>]],[[xy|<X>,<Y>]],[[simple|<D>]]'' **'']''**

Overlay Transparent

This is identical to the **''[O: ]''** command, but uses transparent pictures. 

Transparent areas are also copied.  In this manner one can have holes appear in the base picture, a lowered side wall, another load or many other variations.

There are 3 groups of similar modifiers.

The **''[[o|[O: ]]], [[ot|[OT: ]]], [[ob|[OB: ]]]''** modifiers put the overlay picture immediately on the specified position.

The **''[[ppbpt|[P: ], [PT: ], [PB: ]]]''** modifiers define the place for the overlay picture (usually in a macro definition), the overlay picture will be specified in a following modifier.

The **''[[ddbpt|[D: ], [DT: ], [DB: ]]]''** modifiers define both the position and the overlay picture (usually in a macro definition), the overlay picture will be placed only at the usage of a following modifier, having to specify only the name of the overlaying, a single word.