X-Ray effect

My blender file looks like this:


But my html file has this weird x-ray effect:


Please help!

oops

I've never used this forum before, the links are:


link
link

Hello, in the Properties / Material / Rendering Options panel uncheck the Backface Culling box.

Thanks for your help!
Is there any way to automatically disable the option when I create a new material?

I think not, this option is meant to optimize resources, its function is not to render faces that do not receive light, if you put a light that illuminates the face that appears transparent you will not have to disable Backface Culling.
If your scene is well lit you will not have this problem, if you specifically want to leave objects without receiving light and also want them to be seen, you must deactivate Backface Culling in their material.

I hope you understand me, the translation is with google.

Juani's solution will work, it causes both sides of your normals to display. If you want to see what way your normals are facing, there is a setting in the side panel (N key) to show little lines for which direction your normal surfaces are facing. To flip them around, select your face in edit mode then Mesh > Normals > Flip Normals.