Process pyramide/House or Background image

Hello I would like to implement a Processpyramide or House as "cover page". What I mean is the processmap. I like to design it with the typical processhouse. See the atteched example. If I try an Image it is not possible to increase the image. It would be perfect when i Could use a backround Image and "implement" the processes. Or If there is a possibility to insert such a processpyramide/house as a standart in bizagi. Maybe i just did not find it.

Thanks your for your response

Greetings

(Prozesshaus = process house)

(Führungsprozesse = Management procesess)

(Projektmanagement Prozesse = projectmanagement procesess)

(unterstützende Prozesse = supporting procesess)

(Wertschöpfungs Prozesse = adding value procesess)