A quasi-color process for producing quasi-color photoluminescent lithophane of a digitized picture using only luminance information from the digitized picture comprising:
- inputting a digitized photo;
- dark extruding the digitized photo according to luminance information to obtain dark information of the digitized photo;
- saving the dark extrusion as a 3D model;
- configuring printing parameters of the dark extrusion 3D model via a 3D printing slicer program and outputting a gcode file in response to the configured printing parameters for a printing by a 3D printer;
- updating the gcode file during material post processing stage that sets lithophane color heights to create the quasi-color effect by a quasi-color formula that stacks a plurality of colored layers from bottom to top of a total lithophane height with a white color layer at the bottom, a green color layer atop the white color layer, a lower blue color layer atop the green color layer, a lower red color layer atop the lower blue color layer, a middle blue color layer atop the lower red color layer, an upper red color layer atop the middle blue color layer, and a top blue color layer at the top and stacked above the upper red color layer, wherein the quasi-color formula comprises a five percent white color layer height of the total lithophane height, a nineteen percent green color layer height of the total lithophane height, a ten percent lower blue color layer height of the total lithophane height, a sixteen percent lower red color layer height of the total lithophane height, a ten percent middle blue color layer height of the total lithophane height, a sixteen percent upper red color layer height of the total lithophane height, and a twenty-one percent top blue color layer height of the total lithophane height;
- and
- using the updated gcode file by the 3D printer to produce the quasi-color photoluminescent lithophane.