HI Nicolas
Thank you very much for your help and answers. The problem has been basically solved, but I feel that this operation mode is not very stable. Maybe it is my operate problem. Following your method, according to your method, I changed the terrain adaptive mode in the cache node to the non adaptive mode. When the layout is enabled again in cache, the character no longer flies underground. After saving and opening the file again, I found that the character flies to the underground again, Then I repeated taking the previously saved cache file and doing it again before saving it, and then starting the file again would be great! I really don't understand what the problem is.
Another question is how to avoid the character Penetrate into the wall when simulating the behavior of climbing the wall (WITHOUT UVPIN) Sometimes the character will pass through the wall and slowly return to the track outside the wall.
As for the word 'production' mentioned in the previous question, it may be due to my improper use of the word. What I mean is that cannot continue to adjust the layout. In fact, I am just personal hobby Learning and researching on my own. I apologize for the misunderstanding caused by my poor English proficiency!