Sensor Effects Processing (Quest2) for sensor channels render the scene as it appears at the aperture of the sensor. What remains is to apply the effects introduced by the sensor itself—those that are deliberate, like polarity control, and those that remain despite the designer’s best efforts, like noise. Sensor effects are added by QUEST2, our software post-processor. Applying sensor effects after scene generation is computationally correct in terms of simulating the sensor output. QUEST2 adds no transport delay. QUEST2 supports convolution blur, temporal and fixed-pattern noise, AC coupling, manual and automatic gain and level control, polarity control, and gamma correction.