Smooth shading bug?
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In the attached case all the edges are soft and smooth, but the shading is not (on my graphic card at least). If I move any vertex tiniest bit the faces around it gets smooth shaded
. Am I imagining this? Or is it some kind of feature? ...cheers
Ogan
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I am not sure I entirely understand your problem. However, try setting the "Use for shading" on, dark to 0, and light to 85. Does that have any impact on or ration to your concerns?
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What you suggest made my concern more apparent. There is a miniscule difference between the two spheres, but appearance is significantly different.
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When you turn on "hidden geometry" and select an object and then right click followed by "soften/smooth edges" a dialog box pops up allowing you to control how sharp an edge or face will look. It is definitely a "feature" to help you control the texture of low poly images. I plead ignorance of how well this translates to a render engine. I hope someone will publish a test of this before I feel compelled to do it myself.
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I took a look at the file. I cannot guess the reason. First I guessed that there might be internal faces, but the both spheres have the same number of entities. I also tried to unhide all the edges on the facetted-look one, as it might have been that some of the edges were hidden instead of smoothed, but I didn't find any.
Anssi
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@anssi said:
I took a look at the file. I cannot guess the reason. First I guessed that there might be internal faces, but the both spheres have the same number of entities. I also tried to unhide all the edges on the facetted-look one, as it might have been that some of the edges were hidden instead of smoothed, but I didn't find any.
Anssi
Anssi, I turned smoothing off on both objects and they looked angular and quite similar. And then I turned smoothing on for both objects and set the smoothing and lighting rations to be the same. The both became smooth and roughly similar given that they are in different positions relative to the sun.
Remember you can set sun on or off. You can set smoothing on or off. You can set highlight value and you can set shadow level. You can set the angle between planes where you want the smoothing to commence. To equalize the visual effect, but you need to equalize all five settings and even then the effect will only be roughly equal because the position if both objects is different relative to the light source.
And settings in the edge style will effect both objects differently.
Does this bring our assessment of the tool any closer together?
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Interesting. It's probably due to the angle of the geoshere triangles. You can really see what is happening if you unsmooth and unsoften all the edges, then use the eraser tool + CTRL to smooth them one at a time. You have normal smoothing as you start to smooth the inner edges supporting the larger hexagon. The first 5 smooth normally, but as soon as you smooth the last one to complete the smoothed hexagon, then the smoothing data disappears and all the inner triangles revert. Seems that it could very well be a bug. I thought it could the related to the angle of the shape as I've never seen this in any other daily modeling procedures.
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I agree with Adam. This is most probably an obscure bug which affects only a very narrow range of geometry.
Ogan
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A related question? Does the smoothing function have any effect at all on files sent out for 3D printing. For instance when you convert SU to stl, does the instruction sent to the 3D print head vary in any way?
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I can not see any provision in STL format to indicate softness/smoothness of an edge. So in printing edge softness/smoothness should have no impact.
Ogan
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The two 'wireframes' of the forms overlaid shows they are not identical - but why such small differences in their forms have such dramatic affects is their smooth appearance is a mystery...
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