From f1269753f9fbcc5ba50793b51d975f9654f6243f Mon Sep 17 00:00:00 2001
From: ktyl <me@ktyl.dev>
Date: Thu, 2 Jun 2022 23:09:22 +0100
Subject: [PATCH] update readme

---
 README.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/README.md b/README.md
index 0b3021b..17516b7 100755
--- a/README.md
+++ b/README.md
@@ -3,3 +3,9 @@
 Ray tracing rendering experiments
 
 https://raytracing.github.io/
+
+Produced PPM images can be converted to PNG with `imagemagick`:
+
+```
+convert image.ppm image.png
+```