Shadows, broke OpenGL, broke graphics settings, Exception raised when closing software

resources/EngineResources/shaders/shadow_frag.glsl

@@ -1,5 +1,51 @@
 #version 450
 
-void main() {
+// Keep in sync manually with Java code
+const int MAX_TEXTURES = 256;
 
-}
+layout (location = 0) in vec2 inTextCoords;
+layout (location = 1) in flat uint inMaterialIdx;
+
+layout(location = 0) out vec2 outFragColor;
+
+struct Material {
+    vec4 diffuseColor;
+    uint hasTexture;
+    uint textureIdx;
+    uint hasNormalMap;
+    uint normalMapIdx;
+    uint hasRoughMap;
+    uint roughMapIdx;
+    float roughnessFactor;
+    float metallicFactor;
+};
+
+layout(set = 1, binding = 0) uniform sampler2D textSampler[MAX_TEXTURES];
+layout(set = 2, binding = 0) readonly buffer MaterialUniform {
+    Material materials[];
+} matUniform;
+
+void main()
+{
+    Material material = matUniform.materials[inMaterialIdx];
+    vec4 albedo;
+    if (material.hasTexture == 1) {
+        albedo = texture(textSampler[material.textureIdx], inTextCoords);
+    } else {
+        albedo = material.diffuseColor;
+    }
+    if (albedo.a < 0.5) {
+        discard;
+    }
+
+    float depth = gl_FragCoord.z;
+    float moment1 = depth;
+    float moment2 = depth * depth;
+
+    // Adjust moments to avoid light bleeding
+    float dx = dFdx(depth);
+    float dy = dFdy(depth);
+    moment2 += 0.25 * (dx * dx + dy * dy);
+
+    outFragColor = vec2(moment1, moment2);
+}