Three-dimensional printing process for obtaining a manufactured article with material effect, the process comprising - at least one supply step of at least one image in digital format reproducing at least one wooden surface portion provided with a plurality of grains , comprising a plurality of pixels; - at least one identification step of at least one color range datum of each of said pixels by means of at least one software; - at least one transformation step of said color range datum into at least one depth spatial datum to produce at least one three-dimensional digital model of at least one manufactured article with material effect provided with at least one outer surface reproducing said grains by means of a plurality of grooves with variable depth; - at least one three-dimensional printing step of said model to obtain said manufactured article with material effect by means of at least one molding device ; and - at least one painting step of said outer surface by means of at least one paint , said paint accumulating in said grooves and reproducing said color range of said grains characterized in that said three-dimensional printing step comprises: - at least one supply step of PVC and of at least one solvent in which said PVC is soluble; - at least one mixing step of said PVC and of said solvent to obtain at least one mixture in the liquid phase; - at least one distribution step of said mixture onto at least one deposition plane ; - at least one evaporation step of said solvent to obtain one layer of PVC of said manufactured article with material effect , said evaporation step being subsequent to said distribution step; and - repeating said distribution step and said evaporation step to obtain a plurality of said overlapping layers of PVC forming said manufactured article with material effect . - at least one supply step of at least one image in digital format reproducing at least one wooden surface portion provided with a plurality of grains , comprising a plurality of pixels; - at least one identification step of at least one color range datum of each of said pixels by means of at least one software; - at least one transformation step of said color range datum into at least one depth spatial datum to produce at least one three-dimensional digital model of at least one manufactured article with material effect provided with at least one outer surface reproducing said grains by means of a plurality of grooves with variable depth; - at least one three-dimensional printing step of said model to obtain said manufactured article with material effect by means of at least one molding device ; and - at least one painting step of said outer surface by means of at least one paint , said paint accumulating in said grooves and reproducing said color range of said grains - at least one supply step of PVC and of at least one solvent in which said PVC is soluble; - at least one mixing step of said PVC and of said solvent to obtain at least one mixture in the liquid phase; - at least one distribution step of said mixture onto at least one deposition plane ; - at least one evaporation step of said solvent to obtain one layer of PVC of said manufactured article with material effect , said evaporation step being subsequent to said distribution step; and - repeating said distribution step and said evaporation step to obtain a plurality of said overlapping layers of PVC forming said manufactured article with material effect . <EOS>