Thanks for helping me look into this. Here's the output typical of the
three kinds of texture files that I'm comparing.
$ oiiotool -v -info */lodDefault.1001.*
"OIIO optimized TIFF" (00:21:46)
Reading tiff/lodDefault.1001.tif
tiff/lodDefault.1001.tif : 4096 x 4096, 4 channel, half tiff
MIP-map levels: 4096x4096 2048x2048 1024x1024 512x512 256x256 128x128
64x64 32x32 16x16 8x8 4x4 2x2 1x1
channel list: R, G, B, A
tile size: 64 x 64
oiio:BitsPerSample: 16
Orientation: 1 (normal)
Software: "OpenImageIO 1.7.3dev : maketx --oiio --wrap periodic -d half
-attrib tiff:half 1 --format tiff -o lodDefault.1001.tif
lodDefault.1001.tex"
DateTime: "2016:09:05 16:50:12"
textureformat: "Plain Texture"
wrapmodes: "periodic,periodic"
fovcot: 1
tiff:PhotometricInterpretation: 2
tiff:PlanarConfiguration: 1
planarconfig: "contig"
tiff:Compression: 8
compression: "zip"
oiio:AverageColor: "0.49954,0.499545,0.938411,1"
oiio:SHA-1: "A71864E23D703B89D9DC79E808D133A4C0248640"
"fake Prman texture" (01:34:23)
Reading fprman/lodDefault.1001.tex
fprman/lodDefault.1001.tex : 4096 x 4096, 4 channel, half tiff
MIP-map levels: 4096x4096 2048x2048 1024x1024 512x512 256x256 128x128
64x64 32x32 16x16 8x8 4x4 2x2 1x1
channel list: R, G, B, A
tile size: 64 x 32
oiio:BitsPerSample: 16
Orientation: 1 (normal)
Software: "OpenImageIO 1.7.3dev : maketx --wrap periodic --separate
--compression lzw -attrib tiff:half 1 --format tiff -d half --tile 64 32
lodDefault.1001.tex -o lodDefault.1001.tex"
DateTime: "2016:09:12 11:40:45"
textureformat: "Plain Texture"
wrapmodes: "periodic,periodic"
fovcot: 1
tiff:PhotometricInterpretation: 2
tiff:PlanarConfiguration: 2
planarconfig: "separate"
tiff:Compression: 5
compression: "lzw"
oiio:AverageColor: "0.49954,0.499545,0.938411,1"
oiio:SHA-1: "A71864E23D703B89D9DC79E808D133A4C0248640"
"genuine Prman texture" (02:00:55)
Reading prman/lodDefault.1001.tex
prman/lodDefault.1001.tex : 4096 x 4096, 4 channel, int16 tiff
MIP-map levels: 4096x4096 2048x2048 1024x1024 512x512 256x256 128x128
64x64 32x32 16x16 8x8 4x4 2x2
channel list: R, G, B, A
tile size: 64 x 32
oiio:BitsPerSample: 16
Orientation: 1 (normal)
XResolution: 1
YResolution: 1
ResolutionUnit: "none"
Software: "Pixar PhotoRealistic RenderMan 18.0"
DateTime: "2016:09:07 18:39:44"
textureformat: "Plain Texture"
wrapmodes: "periodic,periodic"
fovcot: 1
tiff:PhotometricInterpretation: 2
tiff:PlanarConfiguration: 2
planarconfig: "separate"
tiff:Compression: 5
compression: "lzw"
PixelAspectRatio: 1
tiff:subfiletype: 0
oiio:SHA-1: "03E40DE1D710799019D001A18A5EA4AD4479AE2B"
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