1) ASKESTA 3-seater sofa bed, Shiftebu yellow
https://www.ikea.com/en/p/askesta-3-mestnyy-divan-krovat-shiftebu-zheltyy-20450799/ 
2) GILLKHOV Pillow cover, multi-colored Gillkhov multi-colored, 40x65 cm
https://www.ikea.com/en/p/gillhov-chehol-na-podushku-raznocvetnyy-gillhov-raznocvetnyy-10370171/ 
3) SANELA Pillow cover, dark gray, 65x65 cm
https://www.ikea.com/en/p/sanela-chehol-na-podushku-temno-seryy-90447690/ 
4) GURLEY Plaid, gray / black, 120x180 cm
https://www.ikea.com/en/en/p/gurli-pled-seryy-chernyy-20369898/ 

For pillows and blankets, Turbosmooth will not collapse in the modifier stack!

For Corona render, it is recommended to install version no lower than 3, since the glossiness of materials is configured taking into account PBR.