diff --git a/doc/changes/big/mr.873.md b/doc/changes/big/mr.873.md
index b809da40f..50588d1d8 100644
--- a/doc/changes/big/mr.873.md
+++ b/doc/changes/big/mr.873.md
@@ -1,2 +1,9 @@
-New compute based rendering backend in the compositor, currently only supports
-a single projection layer so it's not enabled by default. But comes with ATW.
+---
+- mr.873
+- mr.1517
+---
+
+New compute based rendering backend in the compositor. Through the layer
+squasher it supports both projection and cube layers, not cubemap or equirect
+layers. It is not enabled by default. It also supports ATW. On some hardware the
+use of a compute queue improves latency when pre-empting other GPU work.