diff --git a/pages/tools.blender.svg.md b/pages/tools.blender.svg.md
index 8c155b6..de63c39 100644
--- a/pages/tools.blender.svg.md
+++ b/pages/tools.blender.svg.md
@@ -3,6 +3,7 @@
 ### inkscape
 - before loading to inkscape, fix contrast ratios
 - export as plain svg
+- https://inkscape.org/doc/tutorials/tracing/tutorial-tracing.html
 
 ## Blender
 ### curve / path