diff --git a/README.md b/README.md
index 16b6d9df..7cf94f03 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,5 @@
-![github actions state](https://github.com/Deamon87/WebWowViewerCpp/actions/workflows/main.yml/badge.svg?branch=master)
+![github actions state](https://github.com/Deamon87/WebWowViewerCpp/actions/workflows/main.yml/badge.svg?branch=master)   [![Donate to support developer](https://img.shields.io/badge/Donate-PayPal-green.svg)](https://www.paypal.com/donate/?hosted_button_id=AFUUEL3ZQVVNW)
+
 
 # WebWowViewerCpp
 
@@ -9,7 +10,6 @@ There are two frontends built using this code: standalone map viewer and webgl l
 Webgl version of model viewer runs on https://wow.tools/mv/ page
 
 
-
 ## How to build
 
 *The following text is intended only for developers. Usual users can download ready-to-use binaries from [releases] page*
@@ -41,6 +41,9 @@ Otherwise, you can look at the github actions script in `.github/workflows/` fol
 - Open Map Selection dialog (File -> Open Map Selection)
 - Select a map and adjust the zoom to find the point on minimap. Select a point and click GO
 
+As an option, after v0.1.5, you can start app with "-vulkan" option from command line, which will switch from OpenGL renderer to Vulkan.
+Vulkan renderer is far from perfect, but it even now shows more performance compared to OGL
+
 Happy exploring :)
 
 [releases]:https://github.com/Deamon87/WebWowViewerCpp/releases/