A method of layerwise fabrication of a three-dimensional object by three-dimensional inkjet printing, the method comprising, for each of at least a few of the layers: dispensing at least a first modeling formulation and a second modeling formulation to form a core region using both said first and said second modeling formulations, and at least one envelope region at least partially surrounding said core region using one of said first and said second modeling formulations but not the other one of said first and said second modeling formulations; and exposing said layer to curing energy, thereby fabricating the object, wherein: dispensing said at least a first modeling formulation and a second modeling formulation to form said core region is by jetting each of said formulations out of a plurality of nozzles of a print head, and is in a voxelated manner, wherein each of the curable materials in said first and second modeling material formulations is a UV-curable (meth)acrylic material, and said curing energy comprises UV irradiation, and wherein: said first modeling formulation is characterized, when hardened, by heat deflection temperature determined according to ASTM D-648-06 of at least 90 °C, and said second modeling formulation is characterized, when hardened, by Izod impact resistance value determined according to ASTM D-256-06 of at least 45 J/m; and/or wherein a ratio between elastic moduli determined according to ASTM D-638-04 of said first and said second modeling formulations, when hardened, ranges from 2.7 to 2.9. dispensing at least a first modeling formulation and a second modeling formulation to form a core region using both said first and said second modeling formulations, and at least one envelope region at least partially surrounding said core region using one of said first and said second modeling formulations but not the other one of said first and said second modeling formulations; and exposing said layer to curing energy, thereby fabricating the object, wherein: dispensing said at least a first modeling formulation and a second modeling formulation to form said core region is by jetting each of said formulations out of a plurality of nozzles of a print head, and is in a voxelated manner, wherein each of the curable materials in said first and second modeling material formulations is a UV-curable (meth)acrylic material, and said curing energy comprises UV irradiation, and wherein: said first modeling formulation is characterized, when hardened, by heat deflection temperature determined according to ASTM D-648-06 of at least 90 °C, and said second modeling formulation is characterized, when hardened, by Izod impact resistance value determined according to ASTM D-256-06 of at least 45 J/m; and/or wherein a ratio between elastic moduli determined according to ASTM D-638-04 of said first and said second modeling formulations, when hardened, ranges from 2.7 to 2.9. dispensing said at least a first modeling formulation and a second modeling formulation to form said core region is by jetting each of said formulations out of a plurality of nozzles of a print head, and is in a voxelated manner, wherein each of the curable materials in said first and second modeling material formulations is a UV-curable (meth)acrylic material, and said curing energy comprises UV irradiation, and wherein: said first modeling formulation is characterized, when hardened, by heat deflection temperature determined according to ASTM D-648-06 of at least 90 °C, and said second modeling formulation is characterized, when hardened, by Izod impact resistance value determined according to ASTM D-256-06 of at least 45 J/m; and/or wherein a ratio between elastic moduli determined according to ASTM D-638-04 of said first and said second modeling formulations, when hardened, ranges from 2.7 to 2.9. said first modeling formulation is characterized, when hardened, by heat deflection temperature determined according to ASTM D-648-06 of at least 90 °C, and said second modeling formulation is characterized, when hardened, by Izod impact resistance value determined according to ASTM D-256-06 of at least 45 J/m; and/or wherein a ratio between elastic moduli determined according to ASTM D-638-04 of said first and said second modeling formulations, when hardened, ranges from 2.7 to 2.9.