How to integrate backplate into reflections over the object?

[fa2020]

Hi guys,
Is it possible to use two different HDRI and backplate then having both HDRI and backplate in the reflections over the object?
For example, how can we have both backplate and HDRI reflections over a car model while HDRI and backplate are not related at all?

[guest84672]

You will need to apply the backplate to a piece of geometry instead.

[NM-92]

You can also add image pins in the HDRI editor to achieve certain reflections in some spots.

[fa2020]

You will need to apply the backplate to a piece of geometry instead.

I couldn't make anything out. Can you explain the procedure more? I meant projecting the backplate into the object.

[NM-92]

You will need to apply the backplate to a piece of geometry instead.

I couldn't make anything out. Can you explain the procedure more? I meant projecting the backplate into the object.

I think what he means is actually putting a physical plane in the scene and apply your backplate image as a texture. If you set the material to emissive you can control the strenght of the reflection and, as a plus, it will light your scene a bit. Then you can control the position of the plane to set the reflection where you want, and in the material properties, you can set it to be invisible to the camera.