I'm thinking of it now and I would assume taking screenshots in a 4:3 aspect ratio is ideal, in which case I took the screenshots in 16:9.
Anyway...
Load up CSGO, and your map.
Open console
sv_cheats 1
cl_drawhud 0
r_drawviewmodels 0
bot_kick all
Take screenshots, be aware of your surroundings. Avoid taking pictures of just the sky or the floor surrounded by a single wall.
After taking enough screenshots.
Follow this tutorial,
https://www.youtube.com/watch?v=5uUJv070UwUIf your rendered image is looking odd, instead of retaking new screenshots go ahead and remove some of the screenshots before re rendering. I've created panoramas ranging from 3 to 8 screenshots, with panoramas rendered from 3 screenshots being the result of removing 5 screenshots before a final render and 8 screenshots rendering a perfect panorama.
Trial and error.
