A method is disclosed, including providing data indicative of dimensions of a real-world space within which a virtual world is to be consumed. The method may also include identifying one or more objects within said real-world space, and determining one or more available areas within the real-world space for rendering three-dimensional virtual content, based at least partly on the dimensions of the real-world space. The method may also include identifying one or more of the objects as being movable, identifying, from a set of three-dimensional virtual content items, one or more candidate items unable to be rendered within the available area(s) and which can be rendered if one or more of the movable objects is moved and providing an indication to a virtual reality user device of the candidate virtual item(s) and of the movable object(s) required to be moved.