Contact shading where surfaces meet. Its resolution and denoise passes ride with the level.

Bloom is on or off, it has no quality levels.

DLSS quality preset (Ultra Performance / Performance / Balanced / Quality / DLAA), maps to a discrete render-resolution multiplier. Only used when Sandbox.Engine.Settings.RenderSettings.UpscalerMode is Sandbox.Engine.Settings.UpscalerMode.DLSS. DLSS has no sharpness control.

FSR1 RCAS sharpness in [0..1]. Only used when Sandbox.Engine.Settings.RenderSettings.UpscalerMode is FSR1.

FSR3 RCAS sharpness in [0..1]. Only used when Sandbox.Engine.Settings.RenderSettings.UpscalerMode is FSR3.

FSR3 quality preset (Ultra Performance / Performance / Balanced / Quality), maps to a discrete render-resolution multiplier. Only used when Sandbox.Engine.Settings.RenderSettings.UpscalerMode is Sandbox.Engine.Settings.UpscalerMode.FSR3.

How many samples motion blur takes, and whether it runs at all.

What the individual effects add up to, or Sandbox.Engine.Settings.PostProcessQuality.Custom. Derived rather than stored, so it can't drift from the effects it describes. Setting it writes them all.

Render-resolution scale used by Stretch (40-100%) and FSR1 (50-100%) modes.

Lists SDL fullscreen modes for the current display. Both windowed and fullscreen settings use this list; is retained for compatibility and does not filter it. All returned formats are RGBA8888, matching the game swapchain.

Window, resolution, vsync, frame rate caps and field of view.

Quality and upscaling, back to whatever this machine detects.

Returns the requested MSAA amount when supported, or the best available amount.

Returns whether the given Sandbox.Engine.Settings.RenderSettings.UpscalerMode is usable on the current graphics device. Off / Stretch / FSR1 / FSR3 are always available; DLSS requires NVIDIA hardware with NGX support and is queried from the native render device.