Hi Mariusz,
Not quite easy to do it in automated way, since in Windows icons are stored as compiled resources. These are taken from the file manager/dist/verge3d.res (located in the installation directory). To generate this file, you need metadata (verge3d.rc, located in the same folder) and an ico file (verge.ico, same folder) and then execute a resource compiler, for example rc (included in Visual Studio):
rc verge3d.rc
Once you compile your own res file, it will be automatically embedded in the target exe file by the App Manager.
It is also possible to edit the res (or even exe) file directly, for example by using the Resource Hacker: http://angusj.com/resourcehacker/#download
Soft8Soft Tech Chief
Want more Verge3D updates? Follow me on X, Facebook, or LinkedIn