Works fine with dgVoodoo WIP56
(only D3D9.dll and D3DImm.dll needed) on Windows 10 x64.
Just to add an update to this topic:
Current dgVoodoo2 version is dgVoodoo v22.214.171.124 - for regular usage (released: 01.03.2019)
you need the navigate to the dgVoodoo/MS/x86 (32-bit dll versions(!) even on your 64-bit Win10 OS!) folder and copy
into your Dracula 3 folder.
Switch to fullscreen by editing
And start the game via GOG Galaxy or GOG Shortcut.
Suddenly, the game logo and intro video will run smooth as butter in fullscreen and the game mouse will become visible in game!