Use skybox in Platformer 3D demo to improve sky quality (#1282)

- Restore support for multiple aspect ratios which was inadvertently
  removed in a previous PR.
- Fix corner fix preview incorrectly using VRAM compression (it's
  low-resolution, and only displayed in the editor anyway).

3d/platformer/project.godot

@@ -25,6 +25,7 @@ gdscript/warnings/untyped_declaration=1
 [display]
 
 window/stretch/mode="canvas_items"
+window/stretch/aspect="expand"
 
 [input]
 

3d/platformer/stage/meshes/previews/corner_fix.webp.import

@@ -3,21 +3,19 @@
 importer="texture"
 type="CompressedTexture2D"
 uid="uid://cpcbdn1fytnwo"
-path.s3tc="res://.godot/imported/corner_fix.webp-bc947c0527b474b1e52d39a93f6cd55a.s3tc.ctex"
-path.etc2="res://.godot/imported/corner_fix.webp-bc947c0527b474b1e52d39a93f6cd55a.etc2.ctex"
+path="res://.godot/imported/corner_fix.webp-bc947c0527b474b1e52d39a93f6cd55a.ctex"
 metadata={
-"imported_formats": ["s3tc_bptc", "etc2_astc"],
-"vram_texture": true
+"vram_texture": false
 }
 
 [deps]
 
 source_file="res://stage/meshes/previews/corner_fix.webp"
-dest_files=["res://.godot/imported/corner_fix.webp-bc947c0527b474b1e52d39a93f6cd55a.s3tc.ctex", "res://.godot/imported/corner_fix.webp-bc947c0527b474b1e52d39a93f6cd55a.etc2.ctex"]
+dest_files=["res://.godot/imported/corner_fix.webp-bc947c0527b474b1e52d39a93f6cd55a.ctex"]
 
 [params]
 
-compress/mode=2
+compress/mode=0
 compress/high_quality=false
 compress/lossy_quality=0.7
 compress/uastc_level=0

3d/platformer/stage/panorama.webp.import

@@ -1,40 +0,0 @@
-[remap]
-
-importer="texture"
-type="CompressedTexture2D"
-uid="uid://c3j2c1ejqfb3m"
-path="res://.godot/imported/panorama.webp-c655559bb5045314b4c9859b18ccd417.ctex"
-metadata={
-"vram_texture": false
-}
-
-[deps]
-
-source_file="res://stage/panorama.webp"
-dest_files=["res://.godot/imported/panorama.webp-c655559bb5045314b4c9859b18ccd417.ctex"]
-
-[params]
-
-compress/mode=0
-compress/high_quality=false
-compress/lossy_quality=0.7
-compress/uastc_level=0
-compress/rdo_quality_loss=0.0
-compress/hdr_compression=1
-compress/normal_map=0
-compress/channel_pack=0
-mipmaps/generate=true
-mipmaps/limit=-1
-roughness/mode=0
-roughness/src_normal=""
-process/channel_remap/red=0
-process/channel_remap/green=1
-process/channel_remap/blue=2
-process/channel_remap/alpha=3
-process/fix_alpha_border=true
-process/premult_alpha=false
-process/normal_map_invert_y=false
-process/hdr_as_srgb=false
-process/hdr_clamp_exposure=false
-process/size_limit=0
-detect_3d/compress_to=0

3d/platformer/stage/skybox.gdshader

@@ -0,0 +1,11 @@
+shader_type sky;
+
+uniform samplerCube source_panorama : filter_linear, source_color, hint_default_black;
+uniform float exposure : hint_range(0, 128) = 1.0;
+
+void sky() {
+    // If importing a cubemap from another engine, you may need to flip one of the `EYEDIR` components below
+    // by replacing it with `-EYEDIR`.
+    vec3 eyedir = vec3(EYEDIR.x, EYEDIR.y, EYEDIR.z);
+    COLOR = texture(source_panorama, eyedir).rgb * exposure;
+}

3d/platformer/stage/skybox.gdshader.uid

@@ -0,0 +1 @@
+uid://bromrf0kc05o8

3d/platformer/stage/skybox.webp.import

@@ -0,0 +1,27 @@
+[remap]
+
+importer="cubemap_texture"
+type="CompressedCubemap"
+uid="uid://bnqdokul6s4pt"
+path="res://.godot/imported/skybox.webp-399a875da30c2a97d4f743c79e482475.ccube"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://stage/skybox.webp"
+dest_files=["res://.godot/imported/skybox.webp-399a875da30c2a97d4f743c79e482475.ccube"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/uastc_level=0
+compress/rdo_quality_loss=0.0
+compress/hdr_compression=1
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+slices/arrangement=1

3d/platformer/stage/stage.tscn

@@ -1,15 +1,18 @@
-[gd_scene load_steps=8 format=3 uid="uid://bf8hajxlmh3lw"]
+[gd_scene load_steps=9 format=3 uid="uid://bf8hajxlmh3lw"]
 
 [ext_resource type="Script" uid="uid://vw47tquoshc7" path="res://stage/stage.gd" id="1_re4bd"]
 [ext_resource type="PackedScene" uid="uid://dmlvwah3ypol0" path="res://stage/grid_map.scn" id="1_t0f53"]
-[ext_resource type="Texture2D" uid="uid://c3j2c1ejqfb3m" path="res://stage/panorama.webp" id="2_36a8a"]
 [ext_resource type="ArrayMesh" uid="uid://ba7lhk44sk366" path="res://stage/meshes/floor.res" id="2_vkxfl"]
+[ext_resource type="Shader" uid="uid://bromrf0kc05o8" path="res://stage/skybox.gdshader" id="3_s88my"]
+[ext_resource type="CompressedCubemap" uid="uid://bnqdokul6s4pt" path="res://stage/skybox.webp" id="4_ve7pq"]
 
-[sub_resource type="PanoramaSkyMaterial" id="PanoramaSkyMaterial_3qare"]
-panorama = ExtResource("2_36a8a")
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_ve7pq"]
+shader = ExtResource("3_s88my")
+shader_parameter/source_panorama = ExtResource("4_ve7pq")
+shader_parameter/exposure = 1.0
 
 [sub_resource type="Sky" id="Sky_qdkmq"]
-sky_material = SubResource("PanoramaSkyMaterial_3qare")
+sky_material = SubResource("ShaderMaterial_ve7pq")
 
 [sub_resource type="Environment" id="Environment_vpofs"]
 background_mode = 2