From the dropdown menu, select temporary_1.40 - 1.40.x for incompatible mods (or a similarly labeled 1.40 branch).
While v1.40 was a turning point, the current game requirements (as of April 2026) have been adjusted to support these and subsequent visual updates: Minimum Requirement Recommended (for 1080p/30FPS) Windows 10 (64-bit) Windows 10/11 (64-bit) Intel i5-6400 / AMD Ryzen 3 1200 Intel i5-9600 / AMD Ryzen 5 3600 GTX 660 / RX 460 / Intel HD 630 GTX 1660 / Radeon RX 590 (2GB VRAM) 25 GB available space 25 GB available space Official Download & Safety Download Source
Once you have purchased the game on Steam:
To access the v1.40 beta on Steam:
Introduced to celebrate the 5th anniversary of American Truck Simulator , the extended chassis update was another highly-requested feature. For the first time, players gained access to a wide range of new chassis configurations for every truck in their fleet.
Because of the brand-new lighting system, v1.40 demands slightly more processing power from your graphics card compared to older versions. Minimum System Requirements Windows 7/8.1/10 64-bit Processor: Intel Core i5-6400 or AMD FX-8320 Memory: 8 GB RAM
SCS Software’s development team undertook a massive effort to implement this system. They had to revise not only the game’s graphics renderer and code but also the majority of in-game assets, textures, and materials to work properly with the new physical model. The result is a more immersive environment where light and shadow behave realistically based on factors like weather, time of day, and surface properties of objects in the world. The new system also introduced fully dynamic lighting that adapts to simulated camera exposure, taking into account daylight intensity and world elements within the player’s view. american truck simulator v140 download full
American Truck Simulator 1.40 Open Beta - SCS Software's blog
Night driving became more immersive and challenging. Street lamps and headlights now pierce through a more realistic darkness, especially in desert regions. Heavy Duty Upgrades
If you’re a new player? Stick with the latest version—more features, more states. But if you’re a , a low-end PC user , or someone who just misses that "perfect lighting patch"… v1.40 is a time capsule worth reopening. From the dropdown menu, select temporary_1
The new system is fully dynamic and introduces a "physical light model" based on real-world ratios and units. This means that light, shadows, and reflections now behave far more realistically. Weather effects like fog and rain are also presented with greater accuracy, creating a deeper sense of immersion.
A key component of this overhaul is the simulated camera exposure system. Much like a modern smartphone camera, the game’s engine now intelligently responds to varied light conditions—from the harsh glare of a desert noon to the soft hues of a deep twilight—compressing and expanding the dynamic range to create a more natural visual output.
The defining feature of the v1.40 update is the completely reworked illumination system. SCS Software changed how the game processes light, reflections, and weather states. Because of the brand-new lighting system, v1