* include/freetype/freetype.h (FT_RENDER_MODE_SDF): Improve documentation.
* include/freetype/freetype.h (FT_RENDER_MODE_SDF): Added one more point
to the limitations of sdf.
diff --git a/include/freetype/freetype.h b/include/freetype/freetype.h
index d34c48c..bc3073e 100644
--- a/include/freetype/freetype.h
+++ b/include/freetype/freetype.h
@@ -3399,6 +3399,11 @@
* output due to limited availability of pixel grid to store distance
* information.
*
+ * 4. Since the output buffer is normalized, precision at smaller spread
+ * will be greater than precision at larger spread values, because the
+ * output range of [0 .. 255] will be mapped to a smaller sdf range.
+ * A spread of 2 should be sufficient in most cases.
+ *
* Point (1) and (2) can be avoided by using `bsdf` and overall it is
* more stable than the `sdf` rasterizer.
*
