Reproducible: always
Platform-specific: no
Regression: no

Steps to reproduce:
1. Create FX3D 600x600 scene with sphere at (0, 0, 0) and 100 radius.
2. Set up parallel camera at (-300, -300, -300) with farClip = 1 and nearClip = 0.1
Expected result:
Sphere is invisible because small far clip and becomes visible when changing farClip more than 200 (distance from camera eye to closest point of sphere).
Actual result:
Sphere is visible, changing near/far clip affects nothing. Clipping still works when moving camera.

Sample controls: Arrows to XY move camera, +- for Z, zx keys for farClip and cv for nearClip.

As for me, that really makes ParallelCamera uncomfortable to use.