[TF2] animated model blinks while its spinning

Friend of mine made this sawblade model for TF2 that spins around as animated but for some reason the model is blinking as it spins. Does the model need to be compiled with some properties? Even if the vmt file is same as Valve made spinning sawblade, it still blinks. What could be causing this?

It seems that the cubemap is rotating with the model itself?

2 lines of text isn’t much, try uploading the code and maybe a video (or some photos) of the problem.

Well here’s a vid on it https://www.youtube.com/watch?v=RDhV52w_A5I