How is actual object size in a scene calculated?

Question

I've got stuck with 'pixel per unit' parameters and object scale.

I've created two different sprites. A background picture, 1000x1000 pixels, and another one for a 'player', 200x200 pixels. I've added two empty game objects, with default transform, so positions are (0; 0; 0) and scale is (1; 1; 1). I added a sprite renderer to both of them, and assigned the required sprites. Both sprites have 1 pixel per unit.

And the 'player' in the scene looks much more bigger than the background.

I expect that if ppu=1, then the background would have a size of 1000 units, a player 200 units and it would be 5 times smaller.

What am I doing or understanding wrong? What is an actual object size?

Answer 1

The problem was caused by manual replacing of .png picture in project's folder. At first time I didn't found a valid way to import an image as sprite, so I created a default one in Unity, which creates a sprite and a picture 1x1 pixels. Then I replaced it with my own picture, but metadata didn't change, and the Unity still worked with sprite like it is still 1x1 pixel, not 1000x1000, 200x200 etc.

The valid way to import a picture as sprite is just to put it to Assets folder in the project, or drag and drop a file to Assets folder in Unity.