fix

sdl_gpu.cm

@@ -1627,9 +1627,8 @@ function _do_blit(cmd_buffer, cmd, current_target, get_swapchain_tex) {
     var pass = cmd_buffer.render_pass({
       color_targets: [{
         texture: swap_tex,
-        load: "clear",
-        store: "store",
-        clear_color: {r: 0, g: 0, b: 0, a: 1}
+        load: "load",  // Load existing content to blend layers properly
+        store: "store"
       }]
     })