added blender disclaimer

README.md

@@ -115,6 +115,8 @@ You can change the allowed range of each effect by right-clicking on the effect
 
 ### Rendering a Blender scene
 
+**osci-render currently only works with blender 4.1.x**
+
 This [video](https://www.youtube.com/watch?v=pCn297Ejvlw) explains how to install and use osci-render with Blender. Please note that the video is made for osci-render 1.0, so the interface will look slightly different, but the process is the same.
 
 - Download the Blender add-on from [Releases](https://github.com/jameshball/osci-render/releases) named `osci-render-blender-addon.zip`