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The Poser material room allows you to easily create negatives from any image file using a single colour maths node.
Fig 1: Photographic Negatives
- Create a Colour_Maths node.
- Set the maths function to Subtract.
- Set both colours to White. Ctrl-click on the colour box to skip the Poser colour picker and go directly to the operating system's much better colour picker.
- Plug the Image Map into the Value 2 input of the Colour_Maths node.
In effect you are taking a white sheet and subtracting the original picture from it. If you want a black and white negative, use a normal maths node instead of the colour maths, setting value_1 and value_2 to one.
Of course, the same node network can be used if you actually have the negative and want to get the normal picture! |
