Hi Ben @bgraf,
thanks a lot for the screenshot and hinting to this issue. From what you write, I think the display problems in the simulation designer can be traced back on that this is a rather fine FEA mesh. By default if you have a mesh in the 3D viewer its element edges are visible, to a allow you to check on the mesh fineness and quality, see this screenshot:
If you have a really fine mesh and a small screen, the black element edges can make it very hard to see what is selected. Typically I only have the element edges turned on immediately after the mesh was generated. For the rest of the setup I turn them off using the viewer options at the top. Having the element edges turned off, your mesh should look like this:
which makes it easier to interact with it. Does that solver your issue at least in the simulation designer?
What’s odd is your first screenshot where the model indeed looks darker than it should. If I open it up, it looks normal to me:
I filed an internal issue and a developer will look into it! Will keep you posted.