Here is the screenshot, there is indeed a difference in gray between the middle pieces and the rectangles at the ends, but the rectangles at the ends have an appearance with a Ral 9010, i.e. white. So the color doesn't show up on my cut.
Yes @sbadenis, I have in my 3D section the same color as the faces, i.e. white, well a little gray with the shadows but that's the appearance put in RAL 9010.
On the other hand , @Le_Bidule I don't see where the screenshot you took for me is. It is located in the plan file, not the 3D?
Tested changing the 3D component material to see if the new color applies in the MEP cross-sectional view or not. If so, maybe related to the method of assigning the color (assigned to the body?)
I imagine (I hope) that the colors are defined at the level of each piece and not in the assembly. If you right-click on the first level of your assembly: Do you have the choice between " Remove all appearances " and " Remove all appearances ?" If " Remove all appearances " is proposed, it is because there are "parasitic" appearances at the assembly level (see subassemblies). Do a test by clicking on " Remove all appearances "... (avoid clicking on " Remove all appearances " ... it's violent ... even if CTRL+Z (backspace) is possible.
I'm bouncing back on that... did you select appearances in the Solidworks library (textile, Organic, etc.) or did you click on a color in the propertyManager?
Because to have visibility with the first, it is necessary to be in " realview graphics" while this is not the case with the second case
Thank you @coin37coin, because I think you put your finger on my problem. I now have a color appearing, but I put a bright yellow color and in my cut, I have a grayish yellow color.
Any idea why the yellow is greyed out in the cup and not on the 3D model?
Would it come from the angle of my stage light and therefore a shadow?
That's what I do when I render in general. It's on the interiors of rooms where light isn't supposed to pass through... and therefore it is not represented. This gives a darker color.
Now, as mentioned earlier, this is in cases of representation. For the drawings, I don't know. But it's true that if you're in " realview ", the question can arise. What does it say if you withdraw the option?