Reflections with motion blur problem.

["Objectivo49" <xsi(at)pixmix.tv>]

Hello

Yesterday I just found out one of
our renders of a rolling and bouncing
"paint can" had a small problem in compositing,
as it showed a dark band that looked like the alpha channel
didn't fit the colour:

http://paragrama.net/manalokos/albums/album07/lata.jpg

After some debugging I realized that this was not a problem
originated on my material, but on the reflections themselves combined
with motion blur.

Here is a render of a sphere spinning very fast with 100% reflectivity,
I notice 2 issues:

http://paragrama.net/manalokos/albums/album07/bola.jpg

1 - The reflection is blurred, It shouldn't be at all!
2 - the dark band reappears

Does anyone have a solution for the problem?
I beleive this is a important issue and should be corrected.

Best regards
Filipe Alves

Here is a script for a scene showing the problem:

----------------------------------------------

CreatePrim "Sphere", "MeshSurface"
SetValue "sphere.polymsh.geom.subdivu", 80
SetValue "sphere.polymsh.geom.subdivv", 80
CreatePrim "Sphere", "MeshSurface"
Scale , 10.6428571428571, 10.6428571428571, 10.6428571428571, siRelative, 
siLocal, siObj, siXYZ, , True, , , , , , 0
ApplyShader "Material\Constant", , , , siLetLocalMaterialsOverlap
SIApplyShaderToCnxPoint "Image", 
"Sources.Materials.DefaultLib.Material.Constant.color"
CopyPaste , "Shaders\Texture\Mixers\Mix_2colors.Preset", 
"TransientObjectContainer"
SetValue "TransientObjectContainer.Mix_2colors.base_color.red", 1
SetValue "TransientObjectContainer.Mix_2colors.base_color.green", 1
SetValue "TransientObjectContainer.Mix_2colors.base_color.red", 1
SetValue "TransientObjectContainer.Mix_2colors.base_color.green", 1
SetValue "TransientObjectContainer.Mix_2colors.base_color.blue", 1
SIConnectShaderToCnxPoint 
"Sources.Materials.DefaultLib.Material.Constant.Image", 
"TransientObjectContainer.Mix_2colors.color1", False
SIConnectShaderToCnxPoint "TransientObjectContainer.Mix_2colors", 
"Sources.Materials.DefaultLib.Material.Constant.color", False
ActivateObjectSelTool
SetAndToggleSelection "sphere", , True
ActivateObjectSelTool
ApplyShader , , , , siLetLocalMaterialsOverlap
SetValue "sphere.Material1.Phong.reflectivity.red", 1
SetValue "sphere.Material1.Phong.reflectivity.blue", 1
SetValue "sphere.Material1.Phong.reflectivity.red", 1
SetValue "sphere.Material1.Phong.reflectivity.blue", 1
SetValue "sphere.Material1.Phong.reflectivity.green", 1
SaveKey 
"sphere.kine.local.rotx,sphere.kine.local.roty,sphere.kine.local.rotz", 1
SetValue "PlayControl.Key", 11
SetValue "PlayControl.Current", 11
PrevFrame
Rotate , 0, 1440, 0, siAbsolute, siPivot, siObj, siY, , , , , , , , 0
SaveKey 
"sphere.kine.local.rotx,sphere.kine.local.roty,sphere.kine.local.rotz", 10
SetValue "PlayControl.Key", 5
SetValue "PlayControl.Current", 5
InspectObj "ViewRenderOptions", , , 1
SetValue "ViewRenderOptions.MotionBlur", True
SetValue "ViewRenderOptions.MotionSteps", 10
ActivateObjectSelTool
SetAndToggleSelection "sphere1", , True
ActivateObjectSelTool
CreateProjection "sphere1", siTxtSpherical, siTxtDefaultSpherical, 
"Texture_Support", "Texture_Projection"
SetInstanceDataValue , 
"Sources.Materials.DefaultLib.Material.Constant.Mix_2colors.Image.tspace_id", 
"Texture_Projection"

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