exposureWedge

The exposure reference: known light, read at any exposure.

Contents

• GreyWedge: 21 patches of middle grey (0.18) at -10..+10 stops, one stop per patch, left to right (postReference_greyWedge, unlit).
• ColorChecker: the 24 ColorChecker Classic patches, each its published sRGB value as linear reflectance (postReference_colorChecker, unlit).
• GreySphereLeft / GreySphereRight: two 18% grey spheres lit by Sun, a white directional light of intensity 1 from over the camera's left shoulder.
• ReferenceCamera: the station every reading is taken from, an isolated camera on black with no ambient term, so the light in the frame is the charts' own and the sun's.

The scene's player intent is none. Put the viewport on the camera with camera.setEditorOverride(entity.find("ReferenceCamera").id), or capture it with capture.fromCamera. Sweep __display__'s exposure by powers of two to walk the wedge through the display curve.