I tried to do Hydro, but I can't seem to extend my render distance enough to capture the whole thing at once.
Doesn't do it:
Code:
r_mapextents 99999;
cl_maxrenderable_dist 99999;
r_propsmaxdist 99999;
I was thinking of making a video guide to show people how to make these shots, but I dunno if it's worth it, especially since it seems everyone who might actually use those screenshots was able to figure it out just fine from the instructions.

You can probably use the "setang" command to precisely control the angle of rendering.
BTW, while firstperson/thirdperson doesn't "undo" the "camortho" command, camortho only affects one mode or the other. So type thirdperson before camortho and then use first/third to toggle it on and off.