I have a small collection of planar surfaces placed in the same plane. They are all set to display colour = “By Layer” and are on the same layer. However they are coloured differently: [image] This is unhelpful if you have a lot of layers and need to distinguish them by close colours… Inconsiste…

I think you have your display mode set to color backfaces differently. And by coincidence it’s almost the same purple color as the layer color… My backfaces are set to color red, this is what I see: [image]

Thanks Mitch - great call. Although the backface is per default, i.e. set to use front face settings. That does cause the slight shade change. Moral of the story: check normals on borrowed geometry! Jeremy

[image] jeremy5: Although the backface is per default, i.e. set to use front face settings. That does cause the slight shade change. Hmm. not seeing that here, this is what I get when I turn off backface coloring (i.e. use front face settings). [image]

[image] Helvetosaur: this is what I get when I turn off backface coloring Yes - I can discern a difference in your image. And using an image editor pipette I get two RGB values: [image]

Yep, you’re right, it is a subtle difference but it’s there.

Hi Everyone, I still have this problem even though I have “Color Backfaces” turned off under “Object Settings”. I am primarily working in Grasshopper and this problem also occurs for the previewed GH geometry. It also occurs after this geometry is baked into Rhino. Any ideas? I have checked tha…

Hi Grant, Please post a .3dm file with these surfaces. Regards Jeremy

Sure! Here’s a 3dm file with some of the surfaces shown in the pictures above. Surfaces.3dm (165.6 KB)

Hi Grant, Your surfaces are not all oriented the same way, some are showing their front face, some their back face: [image] Even if you select “Use object colour” for backfaces in the view settings, Rhino will still use a very slightly different shade to distinguish front from back. If it matte…

Hi Jeremy, Thanks for the help! I thought I already checked that but evidently not :sweat_smile: I didn’t know the tidbit about the slight color difference even with backface color off, so thanks for that. Your discussion above makes more sense to me now. I still encounter some weird bug in Gra…

It’s an old bug in Rhino that occurs even if the backfaces are set to use the same settings as the front ones.

Shaded mode display colours of "By Layer" surfaces applied inconsistently

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jeremy5 (Jeremy) August 8, 2021, 6:20pm 5

Yes - I can discern a difference in your image. And using an image editor pipette I get two RGB values:

Shading different on front & back faces issue

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Shaded mode display colours of "By Layer" surfaces applied inconsistently

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