Material Plugins add SSAO,material Plugins not working

Thank you very much for helping me!

use material plugin, and SSAO
SSAO work, but material plugin not working

I found a case on the official website,
add SSAO

SSAO work and material plugin work

What’s the difference between them?

You inject your code too late in the fragment shader, you should inject it at the “CUSTOM_FRAGMENT_BEFORE_FRAGCOLOR” tag and update the finalColor property:

This way, the updated color will correctly be taken into account by the pre-pass renderer.