exrTrader supports all of the metadata provided by LightWave 3D when using the exrTrader image loader and saver, the exrTrader image filter supports a selection of metadata.

The metadata written by the exrTrader image saver is provided by LightWave 3D. The metadata written by the image filter is generated by exrTrader.

The following two tables list the metadata tags as documented in the LightWave 3D SDK, their content and the equivalent attribute as saved and loaded by exrTrader.

The metadata supported by LightWave mirrors EXIF tags which have been designed for digital photography. Tags that don't apply to OpenEXR images have been omitted.

LWIMPAR_PIXELWIDTH Actual (scanned)Pixel Width in (mm). xDensity

LWIMPAR_FRAMESPERSECOND Number Of Frames Per Second. FramesPerSecond

LWIMPAR_BLACKPOINT Black Point Of Layer.

LWIMPAR_WHITEPOINT White Point Of Layer. WhiteLuminance

LWIMPAR_GAMMA Linearity Of RGB Color. always 11

LWIMPAR_PIXELXDIMENSION Valid image width. native

LWIMPAR_PIXELYDIMENSION Valid image height. native

LWIMPAR_EXPOSURETIME Exposure time (reciprocal of shutter speed). Unit is seconds. ExpTime

LWIMPAR_FNUMBER The actual F-number(F-stop) of lens when the image was taken. Aperture

LWIMPAR_ISOSPEEDRATINGS CCD sensitivity equivalent to Ag-Hr film speedrate. (int) IsoSpeed

LWIMPAR_DATETIMEORIGINAL Date/Time of original image taken. This value should not be modified by user program. CapDate

LWIMPAR_FOCALLENGTH Focal length of lens used to take image. Unit is millimeter. FocalLength

LWIMPAR_MAKERNOTE Maker dependent internal data. Some of maker such as Olympus/Nikon/Sanyo etc. uses IFD format for this area. See table of Maker Metadata

LWIMPAR_USERCOMMENT Stores user comment. Comment editable LWIMPAR_APERTUREVALUE The actual aperture value of lens when the image was taken. To convert this value to ordinary F-number (F-stop),calculate this value's power of root 2 (=1.4142). For example, if value is '5', F-number is 1.4142^5 = F5.6. Aperture

LWIMPAR_SUBJECTDISTANCE Distance to focus point, unit is meter. Focus

LWIMPAR_MAKE Manufacturer of recording equipment. Make

LWIMPAR_MODEL Model name or model number of recording equipment. Model

LWIMPAR_SOFTWARE Name and version of the software used. Software

n/a Name of the computer that has written the image2 ComputerName

n/a Timezone offset for the capture date3 UtcOffset

n/a Username Owner

LWMN_COMPANYNAME Company Name LW.Company

LWMN_FRAMENUMBER Current frame number LW.FrameNumber

LWMN_FIRSTFRAME First frame number LW.FirstFrame

LWMN_LASTFRAME Last frame number LW.LastFrame

LWMN_RENDERTIME Render time LW.Rendertime

LWMN_CAMERANAME Camera Name LW.CameraName

LWMN_CAMERATYPE Camera Type LW.CameraType

LWMN_ANTIALIASING Antialiasing LW.AA

LWMN_LENS Camera lens name LW.Lens

LWMN_PARTICLEBLUR Particle blur On/Off LW.ParticleBlur

LWMN_MOTIONBLURTYPE Motion blur type LW.MBType

LWMN_MOTIONBLURAMOUNT Motion blur amount LW.MBAmount

LWMN_MOTIONBLURPASSES Motion blur passes. LW.MBPasses

LWMN_TOTALPOINTS Total points LW.TotalPoints

LWMN_TOTALPOLYGONS Total polygons LW.TotalPolygons

LWMN_TOTALMEMORY Total memory LW.TotalMemory

LWMN_FRAMESTEP Frame step LW.Framestep

LWMN_RECONSTRUCTIONFILTER Reconstruction filter LW.AAFilter

LWMN_FIELDRENDERING Field rendering LW.FieldRendering

LWMN_RTREFLECTIONS RT reflections LW.RTReflections

LWMN_ADAPTIVESAMPLING Adaptive sampling LW.AdaptiveSampling

LWMN_STEREORENDER Stereo render. LW.Stereo

LWMN_RTREFRACTIONS RT refractions LW.RTRefractions

LWMN_RADIOSITY Radiosity LW.Radiosity

LWMN_RTTRANSPARENCY RT transparency LW.RTTransparency

LWMN_CAUSTICS Caustics LW.Caustics

LWMN_RENDERTHREADS Render threads LW.RenderThreads

LWNM_DEPTHOFFIELD Depth of field LW.DepthOfField

LWMN_OUTPUTFILES Output files LW.OutputFiles