The present disclosure provides a challenge-response testing systems for distinguishing between human users and bots. When a user requests to access an electronic resource on a computing device, the computing device identifies a challenge-response test for the user to complete. As part of the test, the computing device renders a first view of a 3D environment on a digital display. The computing device notifies the user of a test condition to complete. To satisfy the test condition, the user has to provide input that will effect a specified change to the view of the 3D environment seen on the display. Once the user provides electronic input, the computing device updates the viewing perspective of the 3D environment and renders an updated view on the digital display. When the user submits an indication that the test has been completed, the computing device verifies whether the test condition has been satisfied.