iOS, many issues with model rotation, wireframe, transparency and more

I’ve been working on an iOS game with MonoGame 3.7 with Visual Studio for Mac. I have quite a few issues. I selected MonoGame because of my previous experience with XNA. However, many of the things that worked in XNA do not work in MonoGame, at least as far as iOS is concerned.

First, if I rotate a model it rotates in sections as if they aren’t connected. The same model rotates perfectly as one unit in Windows.

Second, I want to render a model as a wireframe but I get an error saying that the method is not implemented. Again, this works fine on Windows.

Third, when implementing semi-transparency on a model in XNA , it only affected models drawn behind the transparency. This worked in XNA but perhaps not in MonoGame. I can see the transparent model rendered behind a fully opaque model. Not cool.

Fourth, the shaders I used in XNA do not compile at all regardless of how I set the compiler pixel and vertex versions. I am not well versed in HLSL.

Fifth, does anyone know how to utilize Game Center. I have search high and low but have not found any MonoGame links that are valid.

Thank you in advance!

Update: I set the DepthStencilState to default. This solved the rotation and transparency issues. I didn’t realize that this had to be done when using a render target.