If you find yourself trying to guess what Unreal Engine's renderer is actually doing, digging through obscure console variables, DrDebug by Abderrezak Bouhedda might be exactly what you need. It's a custom-built, 6,000+ line C++ render diagnostics suite designed for Unreal Engine 5.5 and above.
DrDebug offers real-time split-screen comparisons so you can view debug buffers alongside your final render as it updates live. It also includes accurate exposure and waveform tools, such as native C++ RGB histograms, false color views, and EV100/lux measurements. On top of that, it provides deep inspection tools for DBuffer decals, albedo luminance analysis, and ray tracing validation. DrDebug has zero impact on your project at runtime, thanks to a transient memory architecture.
