Hi Daniele,

Thank you for your reply. The gdalinfo output for one of the files in the 
ImageMosaic is below. Please let me know any other details would be helpful.

Kind regards,
Andrew
__________________________________________________________________________________________________________

Size is 63186, 85092
Coordinate System is:
PROJCS["GDA94_Australian_Albers",
    GEOGCS["GCS_GDA_1994",
        DATUM["Geocentric_Datum_of_Australia_1994",
            SPHEROID["GRS_1980",6378137,298.257222101,
                AUTHORITY["EPSG","7019"]],
            AUTHORITY["EPSG","6283"]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433]],
    PROJECTION["Albers_Conic_Equal_Area"],
    PARAMETER["standard_parallel_1",-18],
    PARAMETER["standard_parallel_2",-36],
    PARAMETER["latitude_of_center",0],
    PARAMETER["longitude_of_center",132],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]]]
Origin = (404205.000000000000000,-855425.000000000000000)
Pixel Size = (30.000000000000000,-30.000000000000000)
Metadata:
  AREA_OR_POINT=Area
Image Structure Metadata:
  COMPRESSION=DEFLATE
  INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left  (  404205.000, -855425.000) (135d32'12.63"E,  8d 8'51.45"S)
Lower Left  (  404205.000,-3408185.000) (136d17' 9.50"E, 31d13'56.41"S)
Upper Right ( 2299785.000, -855425.000) (151d57'51.89"E,  6d30'17.28"S)
Lower Right ( 2299785.000,-3408185.000) (156d 6'16.81"E, 29d21' 4.58"S)
Center      ( 1351995.000,-2131805.000) (144d55'21.91"E, 19d16'24.63"S)
Band 1 Block=256x256 Type=Byte, ColorInterp=Red
  Min=6.000 Max=255.000
  Minimum=6.000, Maximum=255.000, Mean=128.943, StdDev=21.915
  NoData Value=0
  Overviews: 15797x21273, 7899x10637, 3950x5319, 1975x2660, 988x1330, 494x665, 
247x333, 124x167
  Metadata:
    PIXEL_SCALING=GAIN:0.01 OFFSET:-1.0 UNITS:fraction USAGE:val=DN*gain+offset 
NULLVAL_DN:0.0 NULLVAL_UNITS:-1.0
    
SLATS_Metadata2_zipped=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
    STATISTICS_EXCLUDEDVALUES=0.0
    STATISTICS_HISTOBINFUNCTION=direct
    
STATISTICS_HISTOBINVALUES=0|0|0|0|0|0|1|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|1|0|0|0|0|1|0|1|0|0|1|1|0|0|0|1|0|0|0|0|0|1|1|1|0|1|0|1|1|1|3|2|0|3|2|5|4|4|6|3|2|8|8|8|12|20|8|12|21|27|34|35|53|59|69|74|104|126|142|235|311|405|580|844|1247|2003|3170|5896|11584|28122|82323|337955|3432273|82332841|47322470|45452611|46019523|48617553|49476403|49484740|48772152|47487172|45980557|44224582|42345069|40456003|38541767|36701319|35069599|33655988|32414076|31317247|30438560|29759437|29237128|28826099|28400183|28045332|27930777|27960698|27960484|27897016|28061774|28220247|28455985|28711194|28912652|28872567|28724271|28820106|28899570|28779381|28456461|28474417|28345272|28089628|27768141|27239383|26502969|25832120|25032892|23987900|22948157|22459095|21735923|20845239|19846172|18902263|17878741|16870028|16020816|15135946|14281153|13475325|12766517|12150121|11592503|11079056|10599804|10132055|9607758|8981825|8408390|7953707|7631974|7277685|6814626|6408278|6062839|5707270|5295315|4910657|4578890|4253381|3920331|3594137|3280236|2999445|2738723|2492592|2266991|2056750|1867099|1707125|1582699|1495152|1468777|1471911|1550524|1709697|1464856|874776|301950|112966|12966|2595|1150|717|516|317|247|189|131|133|76|64|64|42|43|30|23|12|24|16|12|8|15|8|8|12|5|5|6|5|3|0|7|1|0|1|1|2|3|0|3|2|0|0|1|1|2|3|2|1|0|0|1|0|3|
    STATISTICS_HISTOMAX=255
    STATISTICS_HISTOMIN=0
    STATISTICS_HISTONUMBINS=256
    STATISTICS_MAXIMUM=255.0
    STATISTICS_MEAN=128.9430632605046
    STATISTICS_MEDIAN=126
    STATISTICS_MINIMUM=6.0
    STATISTICS_MODE=100
    STATISTICS_SKIPFACTORX=1
    STATISTICS_SKIPFACTORY=1
    STATISTICS_STDDEV=21.914724246377162
Band 2 Block=256x256 Type=Byte, ColorInterp=Green
  Min=1.000 Max=255.000
  Minimum=1.000, Maximum=255.000, Mean=119.587, StdDev=17.895
  NoData Value=0
  Overviews: 15797x21273, 7899x10637, 3950x5319, 1975x2660, 988x1330, 494x665, 
247x333, 124x167
  Metadata:
    PIXEL_SCALING=GAIN:0.01 OFFSET:-1.0 UNITS:fraction USAGE:val=DN*gain+offset 
NULLVAL_DN:0.0 NULLVAL_UNITS:-1.0
    STATISTICS_EXCLUDEDVALUES=0.0
    STATISTICS_HISTOBINFUNCTION=direct
    
STATISTICS_HISTOBINVALUES=0|2|0|0|1|0|0|0|0|0|0|1|0|0|1|1|1|0|0|0|0|0|0|0|0|1|0|0|0|0|0|0|0|1|0|1|0|0|0|0|0|0|0|1|0|1|1|2|0|3|2|2|2|1|0|2|1|4|2|0|1|2|4|4|6|5|5|4|8|6|9|10|10|15|13|16|16|26|28|27|40|59|61|89|92|137|168|204|290|393|572|829|1173|1806|3125|5559|11539|28512|91414|1060454|77439015|70108352|96509686|125053573|130820504|115150567|95493052|78671339|65296430|55341618|47481196|42262460|38494999|35586419|32892894|31082809|29621881|28408820|27237724|26837539|26606815|26419403|26425775|26570555|26631752|26765741|26806222|27075306|27262326|27334258|27217607|26959368|26868351|26552239|26031752|25536139|25098673|24536906|23778935|22906038|22402739|21675378|20426235|19649423|18663494|17726125|16824133|15848828|14817940|13812154|12874493|11953678|11100549|10304583|9504907|8800184|8107143|7520489|6928018|6399172|5877157|5399708|4988459|4603288|4260451|3906963|3594063|3280160|2986086|2730713|2487185|2256793|2042280|1841324|1654140|1477325|1333072|1190069|1068452|956574|857144|765540|682514|609036|547158|481575|422628|366204|310048|258568|211083|169432|133824|106212|76072|50699|34466|23622|17366|12829|7946|3199|1993|1365|953|637|501|356|226|166|150|93|87|67|62|42|35|32|18|23|18|14|19|10|11|4|4|6|12|5|7|4|1|3|1|3|3|1|3|3|0|2|1|0|3|0|2|0|1|1|0|0|2|1|0|8|
    STATISTICS_HISTOMAX=255
    STATISTICS_HISTOMIN=0
    STATISTICS_HISTONUMBINS=256
    STATISTICS_MAXIMUM=255.0
    STATISTICS_MEAN=119.58710894910986
    STATISTICS_MEDIAN=113
    STATISTICS_MINIMUM=1.0
    STATISTICS_MODE=104
    STATISTICS_SKIPFACTORX=1
    STATISTICS_SKIPFACTORY=1
    STATISTICS_STDDEV=17.89533291249844
Band 3 Block=256x256 Type=Byte, ColorInterp=Blue
  Min=1.000 Max=255.000
  Minimum=1.000, Maximum=255.000, Mean=150.084, StdDev=15.284
  NoData Value=0
  Overviews: 15797x21273, 7899x10637, 3950x5319, 1975x2660, 988x1330, 494x665, 
247x333, 124x167
  Metadata:
    PIXEL_SCALING=GAIN:0.01 OFFSET:-1.0 UNITS:fraction USAGE:val=DN*gain+offset 
NULLVAL_DN:0.0 NULLVAL_UNITS:-1.0
    STATISTICS_EXCLUDEDVALUES=0.0
    STATISTICS_HISTOBINFUNCTION=direct
    
STATISTICS_HISTOBINVALUES=0|1|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|1|0|1|0|0|0|1|0|0|1|0|1|0|0|1|0|1|1|0|0|0|0|1|1|1|3|2|3|2|3|3|1|1|2|1|0|4|1|2|6|6|4|7|3|9|5|15|4|9|9|11|12|17|25|29|20|21|46|35|68|63|99|92|121|106|169|233|292|346|493|644|850|1225|1591|2408|3715|6292|11314|24495|66560|229745|1156105|6611841|2352507|2101413|2110019|2226785|2397498|2602481|2835443|3102177|3399248|3731465|4088534|4479218|4883414|5307784|5761738|6246683|6775932|7316127|7887052|8468692|9081201|9786920|10553782|11270422|12031709|12898273|13859582|14767153|15701752|16891194|18279854|19791732|21255895|22729535|24258150|25898775|27698944|29627151|31744134|34080610|36570520|39136228|41733989|44647012|47573899|50448156|53389766|56145976|58665409|61293588|63862904|66018245|67447781|68335950|68808077|68425394|67255838|65354003|62725597|59324382|55661389|51587716|46960779|42381569|38034056|33740956|29613136|25789074|22337352|19228499|16438378|14066203|11950363|10115376|8554401|7270125|6197052|5252879|4483531|3847223|3316462|2863433|2500288|2187282|1939490|1751018|1604953|1484510|1376607|1287668|1217342|1170401|1131765|1097554|1041126|1019755|1026754|1076964|1336964|3657891|507854|98590|25323|8072|3275|1593|1002|687|486|316|274|211|168|131|90|94|81|59|46|37|34|28|25|26|24|12|11|16|9|9|3|7|6|11|4|3|3|6|3|5|1|4|7|6|3|2|0|0|1|1|1|0|1|1|16|
    STATISTICS_HISTOMAX=255
    STATISTICS_HISTOMIN=0
    STATISTICS_HISTONUMBINS=256
    STATISTICS_MAXIMUM=255.0
    STATISTICS_MEAN=150.08418475089576
    STATISTICS_MEDIAN=152
    STATISTICS_MINIMUM=1.0
    STATISTICS_MODE=155
    STATISTICS_SKIPFACTORX=1
    STATISTICS_SKIPFACTORY=1
    STATISTICS_STDDEV=15.284313311004041
________________________________
From: Daniele Romagnoli <daniele.romagn...@geo-solutions.it>
Sent: Wednesday, 25 September 2019 5:12 PM
To: Andrew Cleland <a.clel...@uq.edu.au>
Cc: geoserver-users@lists.sourceforge.net 
<geoserver-users@lists.sourceforge.net>
Subject: Re: [Geoserver-users] ImageMosaic GrayChannel Styling

Hi Andrew,
can you share some details about your dataset?
A gdalinfo command run on the configured file can provide some info on it 
(datatype, bands, ...)

Please, let us know.
Regards,
Daniele


On Wed, Sep 25, 2019 at 5:06 AM Andrew Cleland 
<a.clel...@uq.edu.au<mailto:a.clel...@uq.edu.au>> wrote:
Hi all,

I'm migrating some layers from Geoserver 2.9.3 to 2.15.1. A Style for an 
ImageMosaic layer is behaving unexpectedly on the new version of Geoserver.

The SLD is here: https://pastebin.com/DKyZhuZU

When this style is applied to a 3 band ImageMosaic, it shows up as completely 
black. I've tried changing the Input Transparency Color and Output Transparency 
Color in the Coverage Parameters options, which worked to fix other layers, but 
did not help in this case.

I found some documentation about GrayChannel 
here<https://docs.geoserver.org/stable/en/user/styling/sld/reference/rastersymbolizer.html#channelselection>,
 which suggests that this should work. It works on Geoserver 2.9.3. Have any 
changes been made since then which could affect how GrayChannel styling is 
applied?

Kind regards,
Andrew

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- Earning your support instead of buying it, but Ian Turton: 
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--
Regards,
Daniele Romagnoli
==
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==

Ing. Daniele Romagnoli
Senior Software Engineer

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