diff --git a/CustomTonemapping.cginc b/CustomTonemapping.cginc
new file mode 100644
index 0000000..8cf3b63
--- /dev/null
+++ b/CustomTonemapping.cginc
@@ -0,0 +1,22 @@
+#ifndef CUSTOM_TONEMAPPING_CG_INCLUDED
+#define CUSTOM_TONEMAPPING_CG_INCLUDED
+
+// #pragma multi_compile __ ACES_TONE_MAPPING
+
+#if ACES_TONE_MAPPING
+
+// frag: ACES_TONE_MAPPING_APPLY(col);
+#define ACES_TONE_MAPPING_APPLY(col) \
+  float3 shoulderLinearCol = col.rgb * 2.50999999 + 0.0299999993; \
+  shoulderLinearCol = col.rgb * shoulderLinearCol; \
+  float3 linearToeCol = col.rgb * 2.43000007 + 0.589999974; \
+  linearToeCol = col.rgb * linearToeCol + 0.140000001; \
+  col.rgb = clamp(shoulderLinearCol / linearToeCol, 0, 1)
+
+#else
+
+#define ACES_TONE_MAPPING_APPLY(col)
+
+#endif
+
+#endif // CUSTOM_TONEMAPPING_CG_INCLUDED