VRay HDRI Backplate Problem

#1

Hi,

I am learning 3ds max. Recently made an interior scene lit wit HDRI. This was my setup. Vray dome light with HDRI map loaded for reflection. Used the same hdri as environment. This was my result. Render 1

But, I didn’t like the background and so wanted to change that with a random city image. I replaced the environment map with a bitmap. Added the bitmap to a material slot and made as environment screen. Then I instanced that back to the environment map. This was my result. Backplate Render

The render was a weird looking, transparent image. No idea what’s the problem. What am I doing wrong? What is the correct way to set a backplate with hdri?

#2

The second link doesen’t work, but hdri are light related and don’t have to be seen in the actual render. It’s quite hard to match good light with a perfect background image too, so whenever i use hdri i still use another background for the picture. Better solution would be using a proper hdri lighting (in proper format! not just some googled up jpeg) and then placing the background image on a plane with VrayLightMtl