Hi @Marjan,
There isn’t a way to do that in the Playcanvas editor right now, but you could leverage the unofficial editor scripting API for that. So basically you will have to position the camera for each face, render to texture and save it either as an asset or download it from the browser.
Search for “editor scripting” in the forums and you will find a number of posts on the subject. Here is one to get you started: