Unity3d trailer component is displayed normally under UI interface

Adding a trailing effect to the UI under canvas in your project reveals that the UI completely obscures the trailer.

If you want to display normally, the canvas must be set, and the Render Mode

I'm using-camera mode here.

Next to the material to set the render Queue, the default 3000 here needs to be set to 3000 or less

The last is to set the trail renderer component as follows

At this point, the trailing effect is displayed in the game interface!

Unity3d trailer component is displayed normally under UI interface