Natural CRT simulates the image on the CRT displays that present scanlines having a blur, color phosphors, and the diffusion of light rays.
An image on a CRT monitor is drawn with luminescence by beams of electrons, so pixels on a CRT has different size by reason of divergence of electron beams. Moreover, The CRT monitor appears to have anti-aliasing because CRT phosphors (color masks) do not sync with an image resolution.This effect generates images like CRT naturally to simulate these characteristics.
Optimization for each resolution
If you imitate phosphor filters simple honesty, you would need a very high resolution. Thus we prepared optimized filter patterns for each output resolutions.
The output image is going to dim by adding scanlines and color filtering. Therefore our effect mitigates brightness in several ways.