This paper explores the creative tensions involved in bringing together the rapid ideation of theatre devising process with the meticulous development typical of 3D and immersive production. With reference to a collaboration between University of Plymouth and the Wardrobe Ensemble theatre company, the text focuses on the integration of Unreal Engine into devised theatre production. It discusses: the navigation of these differing temporalities; methodologies for creating media in a way is incorporated into the devising process; and the promotion of media assets as active elements within the narrative. The approach of “t(h)inkering” is introduced—combining the concepts of thinking and tinkering—as a process that eschews linearity of common 3D, animation and VFX production pipelines, emphasizing instead reflection and experimentation in media creation. The text explores how low-fidelity assets and fast turnaround times facilitated a dynamic dialogue between theatre and creative technologists and concludes by emphasizing a shift in perspective towards viewing Unreal Engine as a sandbox for experimentation rather than a linear production tool, advocating for a process-oriented approach to media creation.