Dev snapshot: Godot 4.8 dev 4

Godot 4.8 dev 4 is a dense snapshot, not a quiet stability pass. The biggest additions for content teams are Trail3D for native 3D trail effects, VisualShader node groups for taming large graphs, and a major editor refactor that turns the main screens into docks. That dock migration also means main screens can be closed or floated, with the Game screen remaining the exception for now.

Rendering gets several practical upgrades. Multi-bounce ambient occlusion approximation should reduce the overly dark look of single-bounce AO, directional lightmap specular now preserves baked specular response in directional LightmapGI setups, and decals have been brought to the compatibility renderer with hardware-dependent limits. On the UI side, Label and RichTextLabel gain auto_font_size plus min/max bounds, which should help with localization and dynamic text without custom sizing code.

The export pipeline also gets a meaningful quality-of-life win: Android and Java SDK setup can now be automated through a new AndroidSDKManager flow, either from Export Presets or the renamed Setup Android Build action. That removes a common onboarding headache for teams targeting mobile, especially when setting up fresh machines or CI environments. The snapshot also includes smaller but useful changes like a tree-based script outline, better 2D polygon editing, and a long list of platform, animation, audio, and editor fixes.