To make scenecapture capture the same quality texture as the viewport

[3yunara]

Hi,i try to use scenecapture to capture the same quality texture as the viewport.
Up to now, the captured texture is still different, the brightness of the shadow is obviously different.
And when I turn off all the light sources in the world,the captured texture shows some colors like basecolor wrongly.This phenomenon existed before I changed the source code.

So, what causes this?Does scenecapture have a custom rendering pass?

[3yunara]

In this picture, we can seethe brightness of the shadow is obviously different.
It looks like lightmass is not working