Method for generating relief prints

A computer program product, including computer readable code embodied on a non-transitory computer readable medium, said computer readable code comprising instructions for executing the steps of:

• receiving a relief raster image, comprising customary color channels for indicating a color of each pixel and a height channel for indicating a height of each pixel of the relief raster image;
• discriminating in the relief raster image for each pixel a relief part, a white part and a skin part, the parts constituting the height of the pixel;
• deriving from the relief raster image a number of pass images to be printed on top of each other, each pass image comprising pass pixels for which a colorant composition is established based on a part of the pixel to which the pass pixel contributes;
• and
• transferring said pass images to a print engine, that comprises a white colorant and is configured to print the pass images in a predetermined order by applying said established colorant composition on a position of the substrate associated with a pixel in the relief raster image,
• wherein the relief part comprises an arbitrary colorant composition, the white part comprises mainly white colorant and the skin part comprises colorants according to a color as defined in the color channels.

A print system configured to generate relief prints on a substantially flat substrate in a number of passes, wherein palpable differences exist between a height of various parts of the relief print, the print system comprising:

• a print controller;
• and
• a print engine, the print engine comprising a number of colorants including a white colorant,
• wherein the print controller is configured to:
• receive a relief raster image, comprising customary color channels for indicating a color of each pixel and a height channel for indicating a height of each pixel of the relief raster image;
• discriminate in the relief raster image for each pixel a relief part, a white part and a skin part;
• derive from the relief raster image a number of pass images to be printed on top of each other, each pass image comprising pass pixels for which a colorant composition is established based on a part of the pixel to which the pass pixel contributes;
• and
• transfer said pass images to the print engine, that is configured to print said number of pass images in a predetermined order by applying said established colorant composition on a position of the substrate associated with a pixel in the relief raster image,
• wherein the relief part comprises an arbitrary colorant composition, the white part comprises mainly white colorant and the skin part comprises colorants according to a color as defined in the color channels.