These variables in macro `Update_Camera()` should be declared with `#local`, rather than `#declare`: `CamL`, `CamD`, `CamR`, `CamU` `no_radiosity` should be added to macro `Screen_Plane()`.
These variables in macro
Update_Camera()should be declared with#local, rather than#declare:CamL,CamD,CamR,CamUno_radiosityshould be added to macroScreen_Plane().