Clamp skybox to prevent +inf overflow

src/engine/Skybox.zig

@@ -41,6 +41,11 @@ pub fn load(filename: []const u8, engine: *Engine, cube_size: u32, global_unifor
     defer img.deinit();
     std.debug.assert(img.num_components == 4);
 
+    // clamp +inf to max half float
+    for (std.mem.bytesAsSlice(f16, img.data)) |*sample| {
+        sample.* = @min(sample.*, std.math.floatMax(f16));
+    }
+
     // --- SYNCHRONIZATION PRIMITIVES ------------------------------------------
 
     const semaphore_transfer_transition = try engine.createSemaphore();