What to do when you don't want an object to be affected by lighting in Unity?
When bringing in photogrammetry models, sometimes, the lighting from the texture is what you want to keep.
However, when you add outside objects or model your own, the lighting does not match.
While you can take a HDRI and put it into the skybox to match lighting, this also changes the lighting and look of the photogrammatry model.
One way you can resolve this issue is by going into the objects material and change it from standard (or whatever material version you are using ex: HDRI or URP) and change it to an "unlit" shader
Once it is changed to unlit, lighting in your scene will no longer impact it.
Note: Shadows from other objects will not appear. If you are using URP or HDRP, decals will not appear on unlit texture.