So, sometimes we have 3D object as background with
color/texture already in them and it's a hassle to lose the color after LT
convert so here is my quick auto action to process color with the tone as
shading for the 3D background.
I will use my own asset [Dorm room with 4 bunk bed] as example
This is the EX version, I will try to make a PRO version later
Here is the action list with steps you should follow, there are 2 version: for colored 3D background and no color 3D background.

The asset will start like this

You can change the LT conversion setting to your liking:

.
After converting, the layers look like this

[MUST DO!] Open Tool Setting and turn off the light source on the Base 3D layer

After that, process with the [Color & Shading setup] action, the result will look like this:
You can still adjust the color/saturation/level/etc after that!

How about assets with no color: (I turn off the texture for this)

You process with the auto action, the color in your own palette for the 3D background
.
Then hit the [Color & Shading setup] action, the result will end up like this, you can tweak things later.

Have fun!