I am pretty sure that this call to R_SetFOV is the only thing that forces non-player actor-based cameras to use an FOV of 90. Would it be too intrusive to add a "double CameraFOV" variable to the Actor class, with a default value of 90., then have the R_SetFOV call use that value instead of hard-coding it to 90.f?
Doing this would at least allow the FOV to be changed via ZScript - Maybe extending ACS's ChangeCamera to take FOV as a fourth parameter could be done as well?
This would eliminate the need for a hacky render-camera-to-texture-then-plaster-that-across-the-entire-screen implementations that I'm currently working around, since that's currently the only way to get a camera with a specific FOV.
As always, I could be oversimplifying the issue...
