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.

2d/sprite_shaders/README.md

@@ -3,9 +3,9 @@
 This is a sample consisting of different shaders applied to some sprites.
 Effects include outlines, blurs, distorts, shadows, glows, and more.
 
-Language: [GDSL](https://docs.godotengine.org/en/latest/tutorials/shaders/shader_reference/shading_language.html)
+Language: [Godot shader language](https://docs.godotengine.org/en/latest/tutorials/shaders/shader_reference/shading_language.html)
 
-Renderer: GLES 2
+Renderer: Compatibility
 
 Check out this demo on the asset library: https://godotengine.org/asset-library/asset/522
 

2d/sprite_shaders/project.godot

@@ -25,6 +25,5 @@ window/stretch/aspect="expand"
 
 [rendering]
 
-quality/driver/driver_name="GLES2"
-vram_compression/import_etc=true
-vram_compression/import_etc2=false
+renderer/rendering_method="gl_compatibility"
+renderer/rendering_method.mobile="gl_compatibility"

2d/sprite_shaders/sprite_shaders.tscn

@@ -13,20 +13,20 @@
 
 [sub_resource type="ShaderMaterial" id="1"]
 shader = ExtResource("1")
+shader_parameter/outline_width = 2.0
 shader_parameter/outline_color = null
-shader_parameter/outline_width = null
 
 [sub_resource type="ShaderMaterial" id="2"]
 
 [sub_resource type="ShaderMaterial" id="3"]
 shader = ExtResource("1")
+shader_parameter/outline_width = 2.0
 shader_parameter/outline_color = null
-shader_parameter/outline_width = null
 
 [sub_resource type="ShaderMaterial" id="4"]
 shader = ExtResource("3")
+shader_parameter/aura_width = 2.0
 shader_parameter/aura_color = Color(0, 1, 0.486275, 1)
-shader_parameter/aura_width = null
 
 [sub_resource type="ShaderMaterial" id="5"]
 shader = ExtResource("4")
@@ -38,13 +38,13 @@ shader_parameter/fattyness = 3.0
 
 [sub_resource type="ShaderMaterial" id="7"]
 shader = ExtResource("6")
+shader_parameter/radius = 5.0
 shader_parameter/modulate = null
-shader_parameter/radius = null
 
 [sub_resource type="ShaderMaterial" id="8"]
 shader = ExtResource("7")
+shader_parameter/offset = Vector2(8, 8)
 shader_parameter/modulate = null
-shader_parameter/offset = null
 
 [sub_resource type="ShaderMaterial" id="9"]
 shader = ExtResource("8")
@@ -52,8 +52,8 @@ shader_parameter/modulate = Color(0.858824, 0.317647, 0.701961, 1)
 
 [sub_resource type="ShaderMaterial" id="10"]
 shader = ExtResource("9")
-shader_parameter/amount = 0.25
 shader_parameter/radius = 5.0
+shader_parameter/amount = 0.25
 
 [sub_resource type="ShaderMaterial" id="11"]
 shader = ExtResource("10")
@@ -127,4 +127,3 @@ region_rect = Rect2(141, 115, 39, 6)
 
 [node name="Camera2D" type="Camera2D" parent="."]
 offset = Vector2(248, 120)
-current = true