Migrate Carpet Mixin names to mojang mappings

src/main/java/carpet/mixins/LevelRenderer_creativeNoClipMixin.java

@@ -0,0 +1,19 @@
+package carpet.mixins;
+
+import carpet.CarpetSettings;
+import net.minecraft.client.player.LocalPlayer;
+import net.minecraft.client.renderer.LevelRenderer;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(LevelRenderer.class)
+public class LevelRenderer_creativeNoClipMixin
+{
+    @Redirect(method = "renderLevel", at = @At(value = "INVOKE", target = "Lnet/minecraft/client/player/LocalPlayer;isSpectator()Z"))
+    private boolean canSeeWorld(LocalPlayer clientPlayerEntity)
+    {
+        return clientPlayerEntity.isSpectator() || (CarpetSettings.creativeNoClip && clientPlayerEntity.isCreative());
+    }
+
+}