Revisions for post #8487

It ultimately depends on your graphics card and computer engine. But it's best to play around with it. If you play around with the engine be sure to restart Tibia afterwords for it to go into effect.
The Game Program talks to graphics card in order to figure out how to display the graphics. Your graphics card can support some or all of them. DirectX is Windows, and is almost always used in Gaming. OpenGL is open standard which is supported by most systems but you want to use this for Linux or Macs because DirectX is not going to work. Software doesn't use graphics cards which is for graphics cards that don't have 3d support.
https://www.tibia.com/forum/?action=announcement&announcementid=79&boardid=13
3a) My frame rate (fps) reading is low. What can I do?
You can navigate to Options > Graphics > Advanced. Here you can adjust your frame rate limit, view your current frame rate, or change the graphics engine. An ideal frame rate would be 40-60 fps. Please test every engine and use the one with the best performance for your system.
If you still experience issues caused by your frame rate, it is possible that you have other applications running which prevent the computer to allocate enough attention to the client. A way to solve this issue is to simply close any unused applications. Also make sure that your graphics driver is up-to-date.

Edit: Added links

https://docs.microsoft.com/en-us/windows/win32/directx
https://docs.microsoft.com/en-us/windows/win32/opengl/opengl
https://www.cprogramming.com/tutorial/openglvsdirectx.html

It ultimately depends on your graphics card and computer engine. But it's best to play around with it. If you play around with the engine be sure to restart Tibia afterwords for it to go into effect.
The Game Program talks to graphics card in order to figure out how to display the graphics. Your graphics card can support some or all of them. DirectX is Windows, and is almost always used in Gaming. OpenGL is open standard which is supported by most systems but you want to use this for Linux or Macs because DirectX is not going to work. Software doesn't use graphics cards which is for graphics cards that don't have 3d support.
https://www.tibia.com/forum/?action=announcement&announcementid=79&boardid=13
3a) My frame rate (fps) reading is low. What can I do?
You can navigate to Options > Graphics > Advanced. Here you can adjust your frame rate limit, view your current frame rate, or change the graphics engine. An ideal frame rate would be 40-60 fps. Please test every engine and use the one with the best performance for your system.
If you still experience issues caused by your frame rate, it is possible that you have other applications running which prevent the computer to allocate enough attention to the client. A way to solve this issue is to simply close any unused applications. Also make sure that your graphics driver is up-to-date.

https://docs.microsoft.com/en-us/windows/win32/opengl/opengl
https://www.cprogramming.com/tutorial/openglvsdirectx.html