Under the Hood: New Lighting System - Update 1.40:
https://steamcommunity.com/app/227300
#ets2 #scssoftware #JimmyDali
The major internal changes
The scene is lit using real-life intensities (illumination: tens of thousands of lux for the daytime, tens of lux at night)
To get light ratios into play - the rising sun overpowering street lamp lights and truck headlights, etc. This means we had to adjust all light sources and also readjust every emissive material in the game.
We have a new display mapping function for better artistic control (exposure, contrast, toe, shoulder)
We needed to get those real-life intensities onto the computer screen in a similar way as a camera's exposure works.
Improved and more sensitive histogram for exposure selection
This is due to the actual exposure being selected differently in every scene, and this varies also with differing light levels and the current weather type.
Light source (street lamps, vehicle lights) changes.
We have switched light sources to a more physical attenuation ('inverse square falloff').
We are in the process of switching to a physical-unit-based configuration to reduce guesswork.
But also many smaller visual tweaks
Relightable reflection
Reflections in shop windows and smooth surfaces better matches the time of day and weather
Improved reflection behavior
On truck paint, shop windows, and glass in general
Sun horizon shadow
Visible when the sun rises or sets
And a zillion other small tweaks, fixes, and changes.
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