Translated by Google:
I have been working on a project for the school and today I was putting some additional details to finish it, today I was making a yacusi but when I went to modify the study wall I saw that the adobes I made disappeared, I activated the edges and I realized that the faces had become transparent, I will have to paint them again but what seems strange to me is that the only way to edit a Waterhouse model is by double clicking it until I get to the part that I want to edit but when I paint it together with the The rest of the model is painted the 3D model that you download along with the other thing that did not happen before, I will have to paint everything again but I wanted to know why this happens, if it is some configuration that I accidentally implemented to the project or if it was simply a mistake by SketchUp
You have to open the levels of grouping until you get to the faces inside. How many levels you have to open is up to you and how you create the model. It’s almost always better to paint the faces and not paint the group/component containers. Also, materials applied to faces will override materials applied to group or component containers.
If you share your SketchUp file with us it will be easier to give you some direction as to how to proceed.