wee problem with support structure visualisation

After slicing the attached 1/2 cylinder hafl-cyl-40.stl with internal Slic3r with support enabled, in 3d view the support structure looks a bit like the "go to warp" visual from StarTrek the movie - i.e. it has streaks to the edge of the viewport.

I have tested your file and it looks normal, see attached photo. How does your version look like. Sounds not like the one I attached.

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voila

I see what you mean, but am not able to reproduce. Can you post the g-code in question and tell me your 3d settings. That should suffice to reproduce the problem. Seems that special conditions are needed to get this problem.

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gcode attached.
gcode.zip

3D dialogue box refuses to screenshot, so registry section below.

I added whatever else I thought might be vaguely relevant.

Note that setting the slicer to skeinforge, on the same half-cylinder with support, and the visualisation behaves normally. Can zoom right in.

Also, with the Slic3r support that does display wrong, the streaks disappear if you zoom far enough out, but then you can't examine the support.

[HKEY_USERS\S-1-5-21-2025429265-1972579041-725345543-1003\Software\Repetier\3D]
"backgroundColor"=dword:ff000000
"facesColor"=dword:ffff0000
"edgesColor"=dword:ffff0000
"selectedFacesColor"=dword:ffff00ff
"printerBaseColor"=dword:ffffffff
"filamenColor"=dword:ff0000ff
"showEdges"=dword:00000000
"showPrintbed"=dword:00000001
"useVBOs"=dword:00000001
"layerHeight"="0.38"
"filamentDiameter"="2.87"
"useLayerHeight"=dword:00000001
"widthOverHeight"="1.8"
"filamentVisualization"=dword:00000001
"hotFilamentColor"=dword:ffff0000
"disableFilamentVisualization"=dword:00000000
"drawMethod"=dword:00000000
"hotFilamentLength"="1000"

[HKEY_USERS\S-1-5-21-2025429265-1972579041-725345543-1003\Software\Repetier\window]
"mainWindow"="22|29|1026|702|Normal"
"logSplitterDistance"=dword:000001c8
"logShow"=dword:00000001
"printerSettingsWindow"="649|20"
"globalSettingsWindow"="66|79"
"fileHistory"="w:\\3dp\\composition_export.gcode|w:\\3dp\\composition.gcode|W:\\3dp\\tom\\incub_top_SF-supp.gcode|W:\\3dp\\prusa\\filament-Spool-support-1.gcode|W:\\3dp\\prusa\\filament-Spool-support-1.stl|W:\\3dp\\SuesStuff\\hexbox-150-bot.stl|W:\\3dp\\calibration-test\\arch-support30.stl|W:\\3dp\\prusa\\filmnt-guide.gcode"
"aboutWindow"="46|60"
"threeDSettingsWindow"="207|75"
"slic3rWindow"="46|90"
"internalSlic3rUseBundledVersion"=dword:00000001
"externalSlic3rPath"="C:\\Program Files\\Repetier-Host\\Slic3r\\slic3r.exe"
"externalSlic3rIniFile"="W:\\3dp\\slic3r-sp60-lh0p3.ini"
"tempZoomLevel"=dword:0000000f
"tempAverageSeconds"=dword:00000078
"tempShowExtruder"=dword:00000001
"tempShowAverage"=dword:00000001
"tempShowBed"=dword:00000001
"tempAutoscroll"=dword:00000001
"tempShowOutput"=dword:00000001
"tempShowTarget"=dword:00000001
"infoEditSplitterDistance"=dword:0000022c


[HKEY_USERS\S-1-5-21-2025429265-1972579041-725345543-1003\Software\Repetier\slic3r\sp40-lhp3-fdens0p2]
"NozzleDiameter"="0.5"
"ZOffset"="0"
"UseRelativeE"=dword:00000000
"Comments"=dword:00000001
"FilamentDiameter"="2.8"
"PackingDensity"="1.1"
"Temperature"="185"
"PrintFeedrate"="40"
"TravelFeedrate"="40"
"PerimeterFeedrate"="40"
"BottomLayerRatio"=".5"
"LayerHeight"="0.3"
"FirstLayerHeightRatio"="1"
"InfillEvery"="1"
"Perimeters"="1"
"SolidLayers"="3"
"FillDensity"=".2"
"FillAngle"="0"
"FillPattern"="rectilinear"
"SolidFillPattern"="rectilinear"
"RetLength"="1"
"RetExtraDistance"="0"
"RetLift"="0"
"RetMinTravel"="2"
"RetSpeed"="10"
"SkirtLoops"="2"
"SkirtHeight"="1"
"SkirtDistance"="3"
"ExtrusionWidthRatio"="0"
"BridgeFlowRatio"="1"
"BridgeSpeed"="40"
"SolidInfillSpeed"="40"
"SmallPerimeterSpeed"="40"
"CoolBridgeFanSpeed"="100"
"CoolDisplayLayer"="1"
"CoolEnableBelow"="60"
"CoolMaxFanSpeed"="100"
"CoolMinFanSpeed"="35"
"CoolMinPrintSpeed"="5"
"CoolSlowDownBelow"="15"
"CoolEnable"=dword:00000001
"GenerateSupportMaterial"=dword:00000001
"GCodeFlavor"=dword:00000000
"SupportMaterialTool"=dword:00000000
"FirstLayerTemperature"="185"
"FanAlwaysEnabled"=dword:00000000
"FirstLayerBedTemperature"="0"
"BedTemperature"="0"
"RandomizeStartingPoints"=dword:00000001
"NumberOfThreads"="1"

Two extra pieces of info:

I reinstalled v0.50 - displays support perfectly at all zoom levels. (and presumably it pick s up the same settings from the registry)
So it's only in 0.51

If in 0.51 I select fine or ultra-fine "Filament Visualisation" I can zoom in much closer before it explodes.

Ok, I found the real problem. Slic3r creates some code that make no sense to me and is responsible for the problem:

G1 X78.796 Y100.735 F2400.000 ; move to first support material point
G1 F600.000 E1.00000 ; compensate retraction
G1 X78.796 Y101.686 F1200.000 E1.03337 ; support material
G1 X78.796 Y100.735 E1.06674 ; support material

You see it prints a line, reverses 180 degrees and prints the same line again. The 180 degree turn causes problems with the shape computation in the connection. The division by zero due to 180 degrees causes the warp effect on your card. My card cooses to ignore these elements instead. I will make some testing on the test, so no more divison by zero should occur.

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Jolly good.
I shall mention the questionable gcode in the slic3r forum...