Remove old and unused project settings, update various demos for 4.2 (#1024)

- Move all demo projects that don't require Forward+/Mobile-only features
  to the Compatibility rendering method. This improves performance significantly
  on low-end devices and ensures visuals are identical to a web export
  of the demo.
- Set deadzone on all inputs to 0.2 for better gamepad usability.
- Remove reliance on `default_env.tres` to use built-in Environment
  resources in the main scene instead (which follows the preview environment
  workflow).
- Remove notices pointing to GDNative or VisualScript, since both were
  removed in 4.0.
- Various bug fixes and usability tweaks to 10+ demos.

viewport/dynamic_split_screen/README.md

@@ -5,7 +5,7 @@ split screen, also called Voronoi split screen.
 
 Language: [Godot shader language](https://docs.godotengine.org/en/latest/tutorials/shaders/shader_reference/shading_language.html) and GDScript
 
-Renderer: Forward Mobile
+Renderer: Compatibility
 
 Check out this demo on the asset library: https://godotengine.org/asset-library/asset/541
 

viewport/dynamic_split_screen/project.godot

@@ -12,7 +12,7 @@ config_version=5
 
 config/name="Dynamic Split Screen"
 config/description="This sample project showcases an implementation of dynamic
-split screen, also called Voronoi split screen, using GDSL."
+split screen, also called Voronoi split screen, using the Godot shader language."
 config/tags=PackedStringArray("3d", "demo", "official")
 run/main_scene="res://split_screen.tscn"
 config/features=PackedStringArray("4.2")
@@ -21,31 +21,31 @@ config/icon="res://icon.webp"
 [input]
 
 move_up_player1={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":87,"key_label":0,"unicode":0,"echo":false,"script":null)
 , Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":0,"axis":1,"axis_value":-1.0,"script":null)
 ]
 }
 move_down_player1={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":83,"key_label":0,"unicode":0,"echo":false,"script":null)
 , Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":0,"axis":1,"axis_value":1.0,"script":null)
 ]
 }
 move_left_player1={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":65,"key_label":0,"unicode":0,"echo":false,"script":null)
 , Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":0,"axis":0,"axis_value":-1.0,"script":null)
 ]
 }
 move_right_player1={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":68,"key_label":0,"unicode":0,"echo":false,"script":null)
 , Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":0,"axis":0,"axis_value":1.0,"script":null)
 ]
 }
 move_up_player2={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":73,"key_label":0,"unicode":0,"echo":false,"script":null)
 , Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194320,"key_label":0,"unicode":0,"echo":false,"script":null)
 , Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":0,"axis":3,"axis_value":-1.0,"script":null)
@@ -53,7 +53,7 @@ move_up_player2={
 ]
 }
 move_down_player2={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":75,"key_label":0,"unicode":0,"echo":false,"script":null)
 , Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194322,"key_label":0,"unicode":0,"echo":false,"script":null)
 , Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":0,"axis":3,"axis_value":1.0,"script":null)
@@ -61,7 +61,7 @@ move_down_player2={
 ]
 }
 move_left_player2={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":74,"key_label":0,"unicode":0,"echo":false,"script":null)
 , Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194319,"key_label":0,"unicode":0,"echo":false,"script":null)
 , Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":0,"axis":2,"axis_value":-1.0,"script":null)
@@ -69,7 +69,7 @@ move_left_player2={
 ]
 }
 move_right_player2={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":76,"key_label":0,"unicode":0,"echo":false,"script":null)
 , Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194321,"key_label":0,"unicode":0,"echo":false,"script":null)
 , Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":0,"axis":2,"axis_value":1.0,"script":null)
@@ -83,7 +83,8 @@ common/physics_ticks_per_second=120
 
 [rendering]
 
-renderer/rendering_method="mobile"
+renderer/rendering_method="gl_compatibility"
+renderer/rendering_method.mobile="gl_compatibility"
+lights_and_shadows/directional_shadow/soft_shadow_filter_quality=4
 environment/defaults/default_clear_color=Color(1, 1, 1, 1)
 anti_aliasing/quality/msaa_3d=2
-environment/default_environment="res://default_env.tres"

viewport/dynamic_split_screen/split_screen.tscn

@@ -29,7 +29,7 @@ shader_parameter/split_active = false
 shader_parameter/player1_position = null
 shader_parameter/player2_position = null
 shader_parameter/split_line_thickness = 10.0
-shader_parameter/split_line_color = Vector3(0, 1, 0)
+shader_parameter/split_line_color = null
 
 [sub_resource type="CapsuleMesh" id="2"]
 radius = 0.375
@@ -203,7 +203,7 @@ albedo_color = Color(0.791675, 0.946163, 0.317723, 1)
 
 [node name="DirectionalLight3D" type="DirectionalLight3D" parent="."]
 transform = Transform3D(-0.866025, -0.433013, 0.25, 0, 0.5, 0.866025, -0.5, 0.75, -0.433013, 0, 0, 0)
-light_energy = 0.75
+light_energy = 0.05
 shadow_enabled = true
 shadow_bias = 0.03
 shadow_blur = 2.0