B&W Image Toning by Maxstar

A short illustration on using this filter.

This filter can give an interesting idea on where to move on with your image just by clicking the random button. If you want some more control you can follow this algorithm.

1. Choose the default settings (the first preset). This will give you a black and white image (which is probably a bit overexposed). Like for the picture below - all the sky details were gone.

2. Use participation sliders to decrease the input of the channels into the image. Like for the image below I started set participation of blue channel to zero and green to 25. This gave me the sky details back (blue+green=cyan, the sky color).

3. Choose the toning if needed. Remember, that if participation is set to 0, the color of the channel or the intensity slider will not make any changes. I wanted a bluish tone on the image, but I couldn't use the blue channel as its participation was set to 0. So I changed the red color of the 1st channel to blue and increased the intensity of the channel.

4. You can alter the chosen tone by using the intensity sliders of other channels. Like here I added some greenish accent by increasing the intensity of the 2nd (green) channel (without changing the green color).

P.S. If you need more colorful variation with retro feeling you might like to try Retro Color Multitone filter. If you need a surrealistic change of colors, you might like Color DJ or Color DJ Light filter.

Here there is BEFORE and AFTER image: