Update readme.md

Exporters/3ds Max/readme.md

@@ -56,8 +56,11 @@ This exporter is designed for 3ds Max 2013+. You just have to unzip the content
 
 (*): Through custom UI
 
+## Animations
 Cameras, lights and meshes have custom properties (Right-click and select "Babylon properties" menu) to automatically launch animations at startup.
 
+Animations are exported by sampling keyframes which can generate a lot of data. To reduce file size, you can opt to use linear interpolation instead of bezier or TCB.
+
 ## Apache License 2.0 (Apache)
 
 Apache License