The most immediate change in was visual. Before this patch, skies often looked flat, and sunsets didn’t feel "warm." SCS introduced a completely reworked image-based lighting (IBL) system alongside brand new skyboxes.
Because it is a demanding post-processing effect, SCS Software added adjustable quality settings to help players balance visual fidelity with frame rates. Map Revamps and New Content Euro Truck Simulator 2 1.38
This meant that the audio no longer just "played"; it reacted. The sound of the engine, the transmission whine, and the air compressor brakes were re-recorded and re-implemented to simulate the acoustics of the cabin. When you switched to the exterior camera, the sound didn't just get quieter or louder—it changed character entirely. You could finally hear the distinct "throatiness" of the exhaust and the mechanical clatter of the engine block without the insulation of the cab. The most immediate change in was visual