When i assign any colored material to the floor, my scene is changed into orange, the white wall should be remain white. Does I do something wrong to the setting??
By the way, how to make the wall in unreal just like the original one??
It looks like you’re seeing radiosity here, the light comping in bounces of the floor and makes everything look a bit yellowish. You could see if a less bright colour on the floor helps, or maybe make the floor less reflective.
Also look at your light colour, might that perhaps be too yellow?