We got a skybox

destrum/assets_src/shaders/cubemap.frag

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+#version 450
+#extension GL_GOOGLE_include_directive : require
+#include "bindless.glsl"
+
+
+layout(location = 0) in vec3 localPos;
+
+// Input equirectangular HDR texture
+
+layout(location = 0) out vec4 outColor;
+
+const float PI = 3.14159265359;
+
+layout(push_constant) uniform PushConstants {
+    mat4 view;
+    mat4 proj;
+    uint skyboxId;
+} pcs;
+
+vec2 sampleSphericalMap(vec3 v) {
+    // Convert direction to spherical coordinates
+    vec2 uv = vec2(atan(v.z, v.x), asin(v.y));
+    uv /= vec2(2.0 * PI, PI);
+    uv += 0.5;
+    return uv;
+}
+
+void main() {
+    // Normalize direction vector
+    vec3 dir = normalize(localPos);
+
+    // Sample from equirectangular texture
+    vec2 uv = sampleSphericalMap(dir);
+    vec4 color = sampleTexture2DNearest(pcs.skyboxId, uv);
+
+
+    outColor = color;
+}