External rendering SDL2

[RootBeerKing]

I’ve been trying to wrap my head around the external rendering feature of Tilengine lately to no avail. I just don’t understand how it’s supposed to work despite reading the documentation and looking at examples. I tried poking around Tilengine’s window.c file to see how it’s done, but attempting to recreate what’s being done in window.c on my own ended with failure. I’m sure it’s just my lack of knowledge in rendering/surfaces to begin with, but I could really use some help on the topic, as I’ve been spinning my wheels here for days. If someone could give me a short example on the proper and most simple way to get TLN_SetRenderTarget working with an SDL_Surface it would be much appreciated. Thank you and have a great day!