It wasn't the 3D that was the problem, though, even though the 3D was obviously not native and the digital mattes were fairly flat. It just wasn't good visuals

It wasn't the 3D that was the problem, though, even though the 3D was obviously not native and the digital mattes were fairly flat. It just wasn't good visuals even in 2D. That said, Dredd 3D was a high mark in 3D because it was almost all native, especially the component effects photography (the Slo-Mo scenes in particular blew me away). The few upconverted shots stick out like sore thumbs. Upconversion can be done well - see T2 3D, which was mesmerizing - but nowadays 3D conversion is now just another VFX workflow with the same drawbacks.