diff --git a/README.md b/README.md
index f7c2cf0..2d65d1e 100644
--- a/README.md
+++ b/README.md
@@ -116,7 +116,7 @@ In the later part I implemented Schlick's Approximation which approximates the r
Here I got some strange result (actually I already noticed that the previous render had a strange cyan sheen on the upper part of the ball, but dismissed it as a result of inaccuracies).
I oddly enough got this wrong result, when trying to render the hollow ball:
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+
It took me some time to find the error and believe it or not, it was the 3% inaccuracy caused by the fast inverse square algorithm! I had to remove it and replace it with a more simple and accurate but slower calculation. The slow down is small but visible! Now I get: