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Thread: materials darker on one side vs. the other

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    materials darker on one side vs. the other

    See attached image. I have a stud wall with sheathing. Imported dwg to family with material shown on respective layers. When shown in realistic view My materials show dark on one side vs. the other. Is there a reason for this or must I go with a support request? It shows the same whether in family mode or project. Even when sun & ambient light settings in 2 different views are the same in project mode.
    Attached Thumbnails Attached Thumbnails materials darker on one side vs. the other-capture.png  

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    Administrator Munkholm's Avatar
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    Weird... Could you post the family, or upload it to dropbox or similar ?

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    See attached.
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    Administrator Munkholm's Avatar
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    Think it´s related to the sun settings... when loaded into a project, and the "Relative to View" is un-checked, it looks the same from both sides...
    Attached Thumbnails Attached Thumbnails materials darker on one side vs. the other-lighting.png  

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    That doesn't make any sense. Relative to view should mean what it says. If I uncheck that, then I should get different shade on one side vs. another. Try just viewing the stud part, hide the sheathing layer. It works opposite. It works as I expect it should work with relative to view checked vs. unchecked.
    Last edited by DoTheBIM; June 7th, 2011 at 06:58 PM.

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    Administrator Munkholm's Avatar
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    Never really thought about it, but now that you mention it, I agree that it´s not logical

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    Quote Originally Posted by DoTheBIM View Post
    That doesn't make any sense. Relative to view should mean what it says. If I uncheck that, then I should get different shade on one side vs. another. Try just viewing the stud part, hide the sheathing layer. It works opposite. It works as I expect it should work with relative to view checked vs. unchecked.
    That depends: are you circling around in 3D? Then the behaviour is correct... Because "relative to view" would mean "relative to home point of view": the orientation you get when clicking on the home button. Which means that the back and front have different shadings.
    Not relative to view means that your "sun" is in a fixed position related to the camera, and circles with you around the object, thus creating a similar shading/colouring from all sides.

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    Administrator Munkholm's Avatar
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    Dont see anywhere where it says "relative to home point of view"

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    Well, that's probably because the 3D view is the only view with a variable view direction. All others types have just one, and the Sun Settings kan be relative or not... Although it is confusing, that's true.

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    I don't follow your logic Martijn. Relative to view has nothing to do with home point of view. relative to view has been in revit way before the view cube. I can reset the home view and still get the same results. Relative to view is Relative to "your" view not Revit's. So setting the sun at 180 relative to view puts it behind your head and it stays there no matter how you orbit around the model. Turning off relative makes the sun rotate with the model and the shades of colors or materials stay constant. I think your backwards or I've not been picturing where the sun is correctly for a long time or just can't read/comprehend straight this late in the day.

    Well I found one difference, but seems I'm going to have to send to support unless anyone has any better ideas.

    The program creating the dwg is creating the sheathing as mesh and the framing as solids. Apparently it looks like the mesh objects have a primary side that revit is picking up on or something. I'm not fluent in AutoCAD anymore so I can't check how it is handling the realistic view (can't figure out how to attach a material).

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