0.2.54.2 (EXPERIMENTAL) - Engine upgrade

Hi all,

There's a build up on the experimental branch with a game engine update, bringing the game up to speed with 4 years of engine changes and fixes.

This is necessary for some engine changes and fixes needed for the GUI overhaul.

A rework on foliage rendering was needed after the engine upgrade, so I took some time to give it a polish while I got it working again.

Changes

• Upgraded from Unity 2022.3 to 6000.3

• Improved the appearance of terrain in Sandbox, Railway, Fields.

• Improved appearance of grass and trees.

• Improved the appearance of rivers and lakes in the sandbox.

• Fixed flicker when switching to and from scope view.

• Reduced popping of levels of detail for trees and grass.

• Fixed vehicles having incorrect collision with some trees.

• Screen-space global illumination can now be enabled, this mainly improves the look of foliage.

• Added a grass distance and density setting.

• Added a shadow distance and shadow quality setting.

• Added a distant object detail quality setting.

• Added a texture resolution quality setting.

• Added quality settings for ambient occlusion, global illumination, reflections and contact shadows.

• Fixed incorrect terrain culling close to the camera on Taiga and Dunes.

• Added quality setting for depth of field (DoF).

• Reduced quality of maximum DoF quality to improve its performance.

• Significantly reduced VRAM usage.

• Colour grading changed from sRGB to ACEScg

Once I've got this update stable, Mark's got Christie suspension ready to go:

• Hamish