LocalExposureAsset

Remarks

The thing a single exposure cannot do. A frame with a sunlit window and an unlit interior has ten or twelve stops between the two, and a tone curve has about six to spend — so whatever the meter picks, one of them is white or black. That is what a camera does and what an eye does not. Unreal 5 ships this; Unity has no counterpart.

⚠ Before the tonemap. It moves radiance around before the curve shapes it, which is the point: the purpose is to bring the highlights into the range the curve can spend, and after the curve there is nothing left to recover.

⚠ view or ev100, and it has to agree with the tonemap's. The pivot is the luminance that stays exactly where it is, and it belongs wherever the meter says middle grey is. A document that gives this and the tonemap different exposures gets a frame that is locally right and globally wrong.

Fields and properties (13)

• public string Name

  The node's name, for debug groups and for a human reading the file.

• public bool Enabled

  Whether the node runs.

• public string Source

  The linear HDR colour it re-exposes.

• public string View

  The view whose lens supplies the exposure value, or empty for Ev100.

• public string Output

  The name the result is published under.

• public PixelFormat Format

  The format of the target it declares.

• public float Ev100

  The exposure value the compression pivots around, when no view supplies one.

• public int Taps

  How many taps the bilateral blur uses along each axis of its cross.

• public float BlurRadius

  How far the bilateral gather reaches, in texels of the quarter-resolution base.

• public float EdgeRange

  How different two luminances have to be, in stops, before a tap stops counting.

• public float HighlightContrast

  How much the highlights are brought down. 0 is off.

• public float ShadowContrast

  And how much the shadows are brought up.

• public float MaximumStops

  A ceiling on how far any pixel may move, in stops.

Used by (4)

• PostEffectFactoryVixen.Rendering.PostFx
• PostEffectTestsVixen.Rendering.PostFx.Tests
• TypeRegistrationVixen.Rendering.PostFx
• Vixen_Rendering_PostFx_LocalExposureAssetSerializerVixen.Rendering.PostFx