cui

Also, if you upgrade to version 5, will it cause the previously stored .fbdc files to not be opened for operation. This has happened when my friend operated it.

Thank you very much for your reply. I tried what you mentioned and it still doesn't work. I also tried boolean with the cylinder and the body/tail separately, but they all reported an error, much to my annoyance..

I'm trying to model a fish-like shape, and when I merge the body part with the tail in a boolean operation, he always fails, please tell me why this happens and exactly how to solve it, thank you all!