creation of texture translated "forced lamera"

[cen82]

Does anyone know how to create a texture that is similar to those already present in inventor for sheet drilling?
in practice I would like to create some sheet with some drilling but without the part file becoming unmanageablein the images I created the texture that interests me.... but the black part must be transparent! ! !

 

[cen82]

I solved.
In short. the pixel below dx defines the transparent color
also the file name of the texture must end with the character &