why do my object files look weird when imported to Unity?

Question

I have made some heart models on medical software Materialise Mimics and have exported them as.obj files because the software doesnt support exporting as.fbx.

I've tried other Unity developed programs with the exact same models and they look really good, but I dont know what they've done to process the files.

I'm quite new to unity and have tried following some guides on making materials and shaders, but nothing seems to work.

Thanks

Object file in 3D viewer

Object file directly imported to Unity

Object file with Material added

Answer 1

I think the model's normals got inverted. Try using a double sided shader like this https://gist.github.com/naojitaniguchi/62ccf37c801ea55517b7 (not mine) and see if it's works I hope it do