New to ImGUI. How can I switch rendering engines? #529

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1. QuinnCG commented on Sep 19, 2025

   

   QuinnCG

   on Sep 19, 2025

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   Hi,

   I'm actually new to this, too, and wasn't originally planning to reply, but I noticed the sample project had references to Veldrid. You may want to start there?

   https://github.com/ImGuiNET/ImGui.NET/blob/master/src/ImGui.NET.SampleProgram/ImGuiController.cs

   The comments suggest this is an implementation for Veldrid.

   Sorry, I couldn't be more help.
2. ReifStanfield commented on Dec 13, 2025

   

   ReifStanfield

   on Dec 13, 2025

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   @wolfieboy09 Sorry to keep you waiting so long on this issue. If you want to continue to use ClickableTransparentOverlay, the solution is to pass your screen size when you inherit from Overlay.

   Using your example, and my screen size of 2560x1440 this looks like this:

   using ImGuiNET;
   using ClickableTransparentOverlay;
   
   namespace  ImGUISandbox;
   
   class ImGUISandbox
   {
       class Program : Overlay(2560,1440)
       {
           protected override void Render()
           {
               ImGui.Begin("The Window");
               ImGui.Text("Some Text Here");
               ImGui.End();
           }
       }
   
       public static void Main(string[] args)
       {
           Program program = new Program();
           program.Start().Wait();
       }
   }

   I have not delved into the internals of Overlay, but it seems to either incorrectly get the screen size by default, or it defaults to something like 1920x1080, which is a lower resolution than my current screen.

   Hope this helps.