Is Camera.SetTargetBuffer obsolete in HDRP?

Hello, this is my first post in unity forum

I tried to get color and depth render texture from the second camera for my custom post-processing in HDRP, however, when I trying to do it using SetTargetBuffer the render texture result is only black texture, both for color render texture and depth render texture

I found a workaround by using two secondary cameras, the "First" secondary camera is used to get color texture, and the "Second" secondary camera is used to get depth texture, but I prefer to use only one secondary camera because I think using two secondary cameras is not an optimal solution.

Color Render Texture by "First" Secondary Camera


Depth Render Texture by "Second" Secondary Camera
Note: Secondary Camera only renders the character, that's why no depth for trees, etc.​

Is there any better way to get both color and depth from the same camera?

 

UPDATE :

I managed to sample depth pass from second camera by using custom pass, now I only use one main camera and one secondary camera, however when I try sampling color camera using custom pass to get better performance the result is broken, probably because lit material is not supported yet by custom pass