FSC curve so weird

As shown in above picture, I think that FSC curve of Non-uniform refinement is weird.
It reached zero at low resolution but spiked up at high resolution in X-axis.

What’s wrong with this ?
Please reply to me.
Thank you…!

Probably because the mask applied is too tight and includes high order noise.

Thank you for your reply
It will be halpful for my project :slight_smile: