From 0420a7a46591d8db575fc1121174293de5749a77 Mon Sep 17 00:00:00 2001
From: Rob Kelly <contact@robkel.ly>
Date: Wed, 3 Sep 2025 20:42:15 -0600
Subject: [PATCH] Reorganized gunk shader

---
 assets/materials/gunk_overlay_bright.material | Bin 944 -> 977 bytes
 levels/sandbox/sandbox.tscn                   |  28 ++++----
 src/shaders/gunk_overlay.gdshader             |  66 +++++++++++++-----
 src/world/world.tscn                          |   2 +-
 4 files changed, 64 insertions(+), 32 deletions(-)

diff --git a/assets/materials/gunk_overlay_bright.material b/assets/materials/gunk_overlay_bright.material
index 7845c90f52c24a0ffa445c58d7dd14441f2dde5b..18b7e2fab8247d08b56b37b83f811fd6be03c779 100644
GIT binary patch
literal 977
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diff --git a/levels/sandbox/sandbox.tscn b/levels/sandbox/sandbox.tscn
index 82e1a84..2279a3e 100644
--- a/levels/sandbox/sandbox.tscn
+++ b/levels/sandbox/sandbox.tscn
@@ -91,7 +91,7 @@ seamless = true
 seamless_blend_skirt = 0.5
 noise = ExtResource("6_l64ek")
 
-[sub_resource type="ShaderMaterial" id="ShaderMaterial_6lnam"]
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_lorhs"]
 resource_local_to_scene = true
 render_priority = 0
 shader = ExtResource("5_rdjtm")
@@ -171,7 +171,7 @@ seamless = true
 seamless_blend_skirt = 0.5
 noise = ExtResource("6_l64ek")
 
-[sub_resource type="ShaderMaterial" id="ShaderMaterial_lorhs"]
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_v2ya2"]
 resource_local_to_scene = true
 render_priority = 0
 shader = ExtResource("5_rdjtm")
@@ -236,7 +236,7 @@ shadow_mesh = SubResource("ArrayMesh_i3ihq")
 [sub_resource type="ConcavePolygonShape3D" id="ConcavePolygonShape3D_0qjrr"]
 data = PackedVector3Array(-4, 4, 4, -4, -4, 4, -4, 4, -4, -4, 4, -4, -4, -4, 4, -4, -4, -4, -4, 4, -4, -4, -4, -4, 4, 4, -4, 4, 4, -4, -4, -4, -4, 4, -4, -4, 4, 4, -4, 4, -4, -4, 4, 4, 4, 4, 4, 4, 4, -4, -4, 4, -4, 4, 4, 4, 4, 4, -4, 4, -4, 4, 4, -4, 4, 4, 4, -4, 4, -4, -4, 4, 4, -4, -4, -4, -4, -4, 4, -4, 4, 4, -4, 4, -4, -4, -4, -4, -4, 4, -4, 4, -4, 4, 4, -4, -4, 4, 4, -4, 4, 4, 4, 4, -4, 4, 4, 4)
 
-[sub_resource type="ShaderMaterial" id="ShaderMaterial_v2ya2"]
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_60cnp"]
 resource_local_to_scene = true
 render_priority = 0
 shader = ExtResource("5_rdjtm")
@@ -303,7 +303,7 @@ shadow_mesh = SubResource("ArrayMesh_jllhp")
 [sub_resource type="ConcavePolygonShape3D" id="ConcavePolygonShape3D_6ood3"]
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-[sub_resource type="ShaderMaterial" id="ShaderMaterial_60cnp"]
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_n2skm"]
 resource_local_to_scene = true
 render_priority = 0
 shader = ExtResource("5_rdjtm")
@@ -334,7 +334,7 @@ shader_parameter/overlay_emission_scale = 1.0
 [sub_resource type="ConcavePolygonShape3D" id="ConcavePolygonShape3D_p1wtp"]
 data = PackedVector3Array(-1.5, 0, -6, -1.5, 0, 6, -1.5, 3, -6, -1.5, 3, -6, -1.5, 0, 6, -1.5, 3, 6, 1.5, 0, 6, 1.5, 0, -6, 1.5, 3, 6, 1.5, 3, 6, 1.5, 0, -6, 1.5, 3, -6, -1.5, 0, 6, -1.5, 0, -6, 1.5, 0, 6, 1.5, 0, 6, -1.5, 0, -6, 1.5, 0, -6, 1.5, 3, 6, 1.5, 3, -6, -1.5, 3, 6, -1.5, 3, 6, 1.5, 3, -6, -1.5, 3, -6)
 
-[sub_resource type="ShaderMaterial" id="ShaderMaterial_n2skm"]
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_e7iqv"]
 resource_local_to_scene = true
 render_priority = 0
 shader = ExtResource("5_rdjtm")
@@ -399,7 +399,7 @@ data = PackedVector3Array(-1, 0, 0.2, -1, -0.4, 0, -1, 0, -0.2, -1, 0, -0.2, -1,
 [sub_resource type="ConcavePolygonShape3D" id="ConcavePolygonShape3D_2l4r6"]
 data = PackedVector3Array(-1.5, 0, -6, -1.5, 0, 6, -1.5, 3, -6, -1.5, 3, -6, -1.5, 0, 6, -1.5, 3, 6, 1.5, 0, 6, 1.5, 0, -6, 1.5, 3, 6, 1.5, 3, 6, 1.5, 0, -6, 1.5, 3, -6, -1.5, 0, 6, -1.5, 0, -6, 1.5, 0, 6, 1.5, 0, 6, -1.5, 0, -6, 1.5, 0, -6, 1.5, 3, 6, 1.5, 3, -6, -1.5, 3, 6, -1.5, 3, 6, 1.5, 3, -6, -1.5, 3, -6)
 
-[sub_resource type="ShaderMaterial" id="ShaderMaterial_e7iqv"]
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_sbkki"]
 resource_local_to_scene = true
 render_priority = 0
 shader = ExtResource("5_rdjtm")
@@ -430,7 +430,7 @@ shader_parameter/overlay_emission_scale = 1.0
 [sub_resource type="ConcavePolygonShape3D" id="ConcavePolygonShape3D_tmxet"]
 data = PackedVector3Array(-1.5, 0, -6, -1.5, 0, 6, -1.5, 3, -6, -1.5, 3, -6, -1.5, 0, 6, -1.5, 3, 6, 1.5, 0, 6, 1.5, 0, -6, 1.5, 3, 6, 1.5, 3, 6, 1.5, 0, -6, 1.5, 3, -6, -1.5, 0, 6, -1.5, 0, -6, 1.5, 0, 6, 1.5, 0, 6, -1.5, 0, -6, 1.5, 0, -6, 1.5, 3, 6, 1.5, 3, -6, -1.5, 3, 6, -1.5, 3, 6, 1.5, 3, -6, -1.5, 3, -6)
 
-[sub_resource type="ShaderMaterial" id="ShaderMaterial_sbkki"]
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_ttaci"]
 resource_local_to_scene = true
 render_priority = 0
 shader = ExtResource("5_rdjtm")
@@ -564,7 +564,7 @@ mask_dim = 128
 body = NodePath("..")
 mesh_instance = NodePath("../..")
 initial_mask = ExtResource("2_2roq2")
-source_gunk_material = SubResource("ShaderMaterial_6lnam")
+source_gunk_material = SubResource("ShaderMaterial_lorhs")
 
 [node name="Monkey" type="MeshInstance3D" parent="Geometry"]
 transform = Transform3D(-0.616239, 0, 0.787559, 0, 1, 0, -0.787559, 0, -0.616239, -2.22512, 1.41158, 2.88581)
@@ -581,7 +581,7 @@ shape = SubResource("ConcavePolygonShape3D_hvf6a")
 mask_dim = 128
 body = NodePath("..")
 mesh_instance = NodePath("../..")
-source_gunk_material = SubResource("ShaderMaterial_lorhs")
+source_gunk_material = SubResource("ShaderMaterial_v2ya2")
 
 [node name="Cube" type="MeshInstance3D" parent="Geometry"]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 8, 4, 0)
@@ -600,7 +600,7 @@ shape = SubResource("ConcavePolygonShape3D_0qjrr")
 mask_dim = 512
 body = NodePath("..")
 mesh_instance = NodePath("../..")
-source_gunk_material = SubResource("ShaderMaterial_v2ya2")
+source_gunk_material = SubResource("ShaderMaterial_60cnp")
 
 [node name="Cylinder" type="MeshInstance3D" parent="Geometry"]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 1.33738, 6, -7.18125)
@@ -618,7 +618,7 @@ shape = SubResource("ConcavePolygonShape3D_6ood3")
 mask_dim = 512
 body = NodePath("..")
 mesh_instance = NodePath("../..")
-source_gunk_material = SubResource("ShaderMaterial_60cnp")
+source_gunk_material = SubResource("ShaderMaterial_n2skm")
 
 [node name="WallSwitch" parent="Geometry" instance=ExtResource("9_p27ol")]
 transform = Transform3D(-4.37114e-08, 0, -1, 0, 1, 0, 1, 0, -4.37114e-08, 3.9, 1.50699, 2.45659)
@@ -641,7 +641,7 @@ shape = SubResource("ConcavePolygonShape3D_p1wtp")
 [node name="Gunkable" parent="LevelTiles/Hallway1/StaticBody3D" node_paths=PackedStringArray("body", "mesh_instance") instance=ExtResource("2_aj57l")]
 body = NodePath("..")
 mesh_instance = NodePath("../..")
-source_gunk_material = SubResource("ShaderMaterial_n2skm")
+source_gunk_material = SubResource("ShaderMaterial_e7iqv")
 
 [node name="AirlockSign" type="MeshInstance3D" parent="LevelTiles/Hallway1"]
 transform = Transform3D(1, 0, 1.74846e-07, 0, 1, 0, -1.74846e-07, 0, 1, 0, 3, -4.5)
@@ -677,7 +677,7 @@ shape = SubResource("ConcavePolygonShape3D_2l4r6")
 [node name="Gunkable" parent="LevelTiles/Hallway2/StaticBody3D" node_paths=PackedStringArray("body", "mesh_instance") instance=ExtResource("2_aj57l")]
 body = NodePath("..")
 mesh_instance = NodePath("../..")
-source_gunk_material = SubResource("ShaderMaterial_e7iqv")
+source_gunk_material = SubResource("ShaderMaterial_sbkki")
 
 [node name="Hallway3" type="MeshInstance3D" parent="LevelTiles"]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 30)
@@ -694,7 +694,7 @@ shape = SubResource("ConcavePolygonShape3D_tmxet")
 [node name="Gunkable" parent="LevelTiles/Hallway3/StaticBody3D" node_paths=PackedStringArray("body", "mesh_instance") instance=ExtResource("2_aj57l")]
 body = NodePath("..")
 mesh_instance = NodePath("../..")
-source_gunk_material = SubResource("ShaderMaterial_sbkki")
+source_gunk_material = SubResource("ShaderMaterial_ttaci")
 
 [node name="GrunkNodule" parent="." instance=ExtResource("10_2roq2")]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -6, 1, -1)
diff --git a/src/shaders/gunk_overlay.gdshader b/src/shaders/gunk_overlay.gdshader
index 9397c41..3e83173 100644
--- a/src/shaders/gunk_overlay.gdshader
+++ b/src/shaders/gunk_overlay.gdshader
@@ -2,33 +2,41 @@ shader_type spatial;
 render_mode depth_prepass_alpha;
 
 group_uniforms gunk_material;
+uniform highp sampler3D gunk_noise;
 uniform vec3 color_1: source_color = vec3(0.0, 0.03, 0.1);
 uniform vec3 color_2: source_color = vec3(0.0, 0.1, 0.3);
 uniform vec3 emission_color: source_color = vec3(0.25, 0.88, 1.0);
-uniform vec3 fresnel_color: source_color = vec3(1.0);
-uniform sampler2D fresnel_gradient;
 
+
+
+// Used ONLY by the gunk, does not affect the gunk mask.
+uniform vec2 uv_scale = vec2(1.0);
+
+uniform float time_scale = 1.0;
 uniform float pixellation = 128.0;
 uniform float time_pixellation = 30.0;
 
 uniform float roughness: hint_range(0.0, 1.0) = 0.15;
 uniform float specular_contribution = 0.8;
 uniform float emission_strength = 0.05;
-uniform float fresnel_power = 4.0;
-uniform float fresnel_intensity = 0.0;
 uniform float bump_strength = 1.0;
 
-// Used ONLY by the gunk, does not affect the gunk mask.
-uniform vec2 uv_scale = vec2(1.0);
-
-uniform float time_scale = 1.0;
-
+group_uniforms gunk_mask;
 uniform float edge_bleed = 0.25;
-
 uniform sampler2D gunk_mask;
 
-uniform highp sampler3D gunk_noise;
-uniform highp sampler3D gunk_normal_map;
+group_uniforms fresnel;
+uniform vec3 fresnel_color: source_color = vec3(1.0);
+uniform sampler2D fresnel_gradient;
+uniform float fresnel_power = 4.0;
+uniform float fresnel_intensity = 0.0;
+
+group_uniforms iridescence;
+uniform vec3 iridescence_color: source_color = vec3(1.0);
+uniform sampler2D iridescence_gradient;
+uniform float iridescence_power = 4.0;
+uniform float iridescence_intensity = 0.0;
+
 
 group_uniforms overlay;
 uniform sampler2D overlay_albedo: hint_default_transparent, filter_nearest;
@@ -36,10 +44,17 @@ uniform sampler2D overlay_emission: hint_default_transparent, filter_nearest;
 uniform float overlay_emission_scale = 1.0;
 
 
-vec3 fresnel_glow(vec3 normal, vec3 view) {
+vec3 rim_glow(
+	vec3 normal,
+	vec3 view,
+	sampler2D gradient,
+	vec3 color,
+	float power,
+	float intensity
+) {
 	float normal_angle = clamp(dot(normalize(normal), normalize(view)), 0.0, 1.0);
-	vec3 color = texture(fresnel_gradient, vec2(normal_angle, 0.0)).rgb * fresnel_color;
-	return pow((1.0 - normal_angle), fresnel_power) * color * fresnel_intensity;
+	vec3 base_color = texture(gradient, vec2(normal_angle, 0.0)).rgb * color;
+	return pow((1.0 - normal_angle), power) * base_color * intensity;
 }
 
 float hardstep(float value) {
@@ -49,7 +64,7 @@ float hardstep(float value) {
 
 float bump_sample(vec2 uv, vec3 uvt, float dx, float dy) {
 	vec2 offset = vec2(dx / pixellation, dy / pixellation);
-	float height = texture(gunk_normal_map, uvt + vec3(offset, 0.0)).r;
+	float height = texture(gunk_noise, uvt + vec3(offset, 0.0)).r;
 	float mask = texture(gunk_mask, uv + offset / uv_scale).r;
 	return height * smoothstep(1.0, 0.0, mask);
 }
@@ -90,7 +105,24 @@ void fragment() {
 
 	// add fresnel
 	vec3 world_normal = mat3(TANGENT, BINORMAL, NORMAL) * (NORMAL_MAP * 2.0 - 1.0);
-	ALBEDO += fresnel_glow(world_normal, VIEW);
+	EMISSION += rim_glow(
+		world_normal,
+		VIEW,
+		fresnel_gradient,
+		fresnel_color,
+		fresnel_power,
+		fresnel_intensity
+	);
+
+	// add iridescence
+	ALBEDO += rim_glow(
+		world_normal,
+		VIEW,
+		iridescence_gradient,
+		iridescence_color,
+		iridescence_power,
+		iridescence_intensity
+	);
 
 	// Hardish edge
 	float mask = texture(gunk_mask, UV).r;
diff --git a/src/world/world.tscn b/src/world/world.tscn
index 4d792d0..4d2d566 100644
--- a/src/world/world.tscn
+++ b/src/world/world.tscn
@@ -4,7 +4,7 @@
 [ext_resource type="Resource" uid="uid://tgac5tnfx56r" path="res://src/world/world_manager.tres" id="2_5kmgb"]
 [ext_resource type="PackedScene" uid="uid://byvjsvavbg5xe" path="res://src/ui/menus/pause_menu/pause_menu.tscn" id="2_6fy3g"]
 [ext_resource type="Resource" uid="uid://0i72bf8ip1lx" path="res://src/world/spook_manager.tres" id="3_l0av5"]
-[ext_resource type="PackedScene" uid="uid://700gr7k3gqlf" path="res://levels/grunkbeast_test/visual_test/visual_test.tscn" id="4_5kmgb"]
+[ext_resource type="PackedScene" uid="uid://dc4tts6342cuj" path="res://levels/prop_test/prop_test.tscn" id="4_5kmgb"]
 [ext_resource type="PackedScene" uid="uid://c0uitm5cg88h1" path="res://src/ui/menus/kill_screen/kill_screen.tscn" id="6_l0av5"]
 [ext_resource type="PackedScene" uid="uid://brknr57xc2cp0" path="res://src/ui/elements/save_icon/save_icon.tscn" id="7_5kmgb"]