As the title mentioned, when playing with the opacity of parts you need to set the opacity control to 99% to return the body to fully opaque. This is with the option Active component visibility disabled.
Setting the opacity to 100% after changing that value results in both artifacts of the visual display part as well as being still translucent.
the artifacting is not present in the screenshot I posted, but both translucent parts have their opacity control set to 100%. The artifacting that happens is like a blurring of edges.
Fusion
