#The distance multiplier on whether or not to hide the player model if the camera gets too close to it. Set to 0 to disable.
#Range: 0.0 ~ 1.7976931348623157E308
keep_camera_out_of_head_distance_multiplier = 0

??

This didn't work.

1.21.1 fabric

The setting you are looking for is "adjust_player_transparency". Please use the appropiate issue template next time when you report an issue.

您要查找的设置是“adjust_player_transparency”。下次报告问题时请使用适当的问题模板。

What I mean is that setting it to "0" doesn't work.

How keep_camera_out_of_head_distance_multiplier works

When set to 0 : The player model is still visible, no matter how close you get with the camera. (adjust_player_transparency is set to true for this demonstration):

When set to 0.75: The player model is not rendered, because the camera is closer than 0.75 blocks to the player:

How adjust_player_transparency works

When set to true: The player model is always rendered at maximum opacity. (keep_camera_out_of_head_distance_multiplier is set to 0 for this demonstration):

When set to false: The player model is rendered with varying transparency . (keep_camera_out_of_head_distance_multiplier is set to 0 for this demonstration):