Resolution, TSR, and Dynamic Resolution

TSR

TSR renders at a lower internal resolution and reconstructs the display image. Its work includes input-resolution and display-resolution costs, so lowering screen percentage may not reduce the TSR pass itself in direct proportion even when it reduces the rest of the frame.

Actions:

1. Capture GPU cost at the production output resolution.
2. Compare controlled primary screen percentages with identical content.
3. Set Anti-Aliasing scalability through sg.AntiAliasingQuality (0 Low through 4 Cinematic).
4. Inspect Show -> Visualize -> Temporal Upscaler for velocity, rejection, translucency, exposure, input/output, and active quality information.
5. Inspect the Scene > PostProcessing > TemporalSuperResolution event in GPU tools.
6. Fix velocity/translucency/material history defects before raising global quality to conceal them.

Avoid routine input screen percentages below 50%; Epic reserves extreme upscaling for exceptional cases such as output beyond 4K or brief dynamic-resolution pressure.

Dynamic Resolution

Enable through Game User Settings/C++ for supported targets, then configure:

CVar	Effect
r.DynamicRes.MinScreenPercentage	lower bound; decreasing permits more quality loss to recover GPU time
r.DynamicRes.MaxScreenPercentage	allocation/quality ceiling
r.DynamicRes.FrameTimeBudget	GPU-frame target in milliseconds
r.DynamicRes.HistorySize	larger smooths decisions but reacts more slowly; smaller reacts faster but is noisier

Use stat unitgraph, then stat raw, to inspect raw GPU time and selected primary screen percentage. Dynamic resolution reacts to prior GPU workload and may panic downward after consecutive over-budget frames. It cannot predict every camera cut/effect burst and cannot recover a CPU-bound frame by doing less GPU pixel work.