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[Henry Bailey]

recoil_henry:

The reason almost every competitive title (CS2, VALORANT, Apex, Rainbow Six) ships on UDP isn’t some marketing choice—it’s that TCP’s reliability guarantees actively hurt you under real network conditions. TCP’s head-of-line blocking is the killer: when a single packet drops mid-stream, every subsequent packet stalls waiting for the retransmission, and that backpressure ripples all the way to your input queue. In a 128-tick shooter you’re measuring latency in single-digit milliseconds, so a retransmission timer firing (often 200ms+ on default Windows stacks) is far more noticeable than a 3%

[Henry Bailey]

Here’s the thing most people miss when black eQualizer starts wrecking your calibration: it’s operating before the panel’s native gamma mapping, so it’s effectively shifting the knee of the transfer function upward on the lower third of the curve. That compresses the code values that used to occupy your shadow and midrange, which is exactly why you suddenly see banding in dark gradients after turning it on. The failure mode isn’t really the feature itself—it’s the interaction with any custom LUT or ICC profile you’ve applied. If you’re running a calibrated LUT at 10-bit but the monitor is doing 8-bit + dithering internally while black eQualizer is active, you’re collapsing a 10-bit signal down to effectively fewer usable steps in the blacks, and

[Henry Bailey]

Great topic. Delta compression in Unreal has fundamentally shaped how competitive netcode scales, and the evolution from naive full-snapshot replication to the delta-based system is worth understanding architecturally. The core mechanism relies on UActorChannel comparing the current replicated state against a cached previous snapshot (PreviousReliableData/bNetDeltaBasedReplication) and only serializing the properties that actually changed. What most people underestimate is that delta accuracy is only as good as your GetLifetimeReplicatedProps declarations—over-replicating trivial data (like per-frame transforms on distant actors) destroys your bandwidth budget. The Replication Graph, introduced in UE 4.20, added the spatial layer on top: instead of every client processing every actor, the graph spatially buckets actors and lets designers throttle update frequency by distance bands. For competitive titles this matters enormously because you’re balancing prediction/interpolation

[Henry Bailey]

Here is the mechanical breakdown: The architecture prioritizes deterministic state reconciliation and thread safety over unconstrained peak throughput.

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"Pixel response over resolution every single day."

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