When I try to render, one of objects on scene remains almost black like it doesnt recive any light, while other objects are normal. Why would the object (on photo its giraffe)not react to light, and what would be the solution ? Will be thankful for any tips :)
Edit: actually my first answer was not accurate, you have an Auto Smooth enabled, in order to make your Auto Smooth work you need to go in the Properties panel > Data > Geometry Data and press the Clear Custom Split Normals Data button.
As explained here: "Your model has a custom split normal data (probably due to a normal edit modifier that has been applied or because the mesh was made with another software...) that keep some face shading in that way."