A method of making an article (14; 26; 36; 60; 62; 64; 120) having a plurality of sub-regions (121a, 121b, 121c, 122, 123; 123, 124a, 124b, 124c) comprising differentially fused foam particles, the method comprising: arranging a plurality of foam particles such that the plurality of foam particles comprise a first foam particle having a first surface formed of a first thermoplastic elastomer material in contact with a second surface of an adjacent foam particle, the second surface of the adjacent foam particle being formed of a second thermoplastic elastomer material; increasing a temperature of at least a portion of the plurality of foam particles with actinic radiation under conditions effective to melt or soften a portion of the first thermoplastic elastomer material of the first surface of the first foam particle, or the second thermoplastic elastomer material of the second surface of the adjacent foam particle, or both; and decreasing the temperature of the melted or softened portion of the first thermoplastic elastomer material, of the second thermoplastic elastomer material, or of both, thereby solidifying the melted or softened portion of the first thermoplastic elastomer material, of the second thermoplastic elastomer material, or of both, and forming a plurality of fused foam particles; wherein the plurality of foam particles has a number average particle size of 0.04 millimeters to 10 millimeters in the longest dimension; wherein the arranging and the increasing of the temperature are repeated; wherein an iteration of the arranging comprises depositing a layer comprising the plurality of foam particles; and wherein the article (14; 26; 36; 60; 62; 64;120) is formed layerwise from a plurality of layers. arranging a plurality of foam particles such that the plurality of foam particles comprise a first foam particle having a first surface formed of a first thermoplastic elastomer material in contact with a second surface of an adjacent foam particle, the second surface of the adjacent foam particle being formed of a second thermoplastic elastomer material; increasing a temperature of at least a portion of the plurality of foam particles with actinic radiation under conditions effective to melt or soften a portion of the first thermoplastic elastomer material of the first surface of the first foam particle, or the second thermoplastic elastomer material of the second surface of the adjacent foam particle, or both; and decreasing the temperature of the melted or softened portion of the first thermoplastic elastomer material, of the second thermoplastic elastomer material, or of both, thereby solidifying the melted or softened portion of the first thermoplastic elastomer material, of the second thermoplastic elastomer material, or of both, and forming a plurality of fused foam particles; wherein the plurality of foam particles has a number average particle size of 0.04 millimeters to 10 millimeters in the longest dimension; wherein the arranging and the increasing of the temperature are repeated; wherein an iteration of the arranging comprises depositing a layer comprising the plurality of foam particles; and wherein the article (14; 26; 36; 60; 62; 64;120) is formed layerwise from a plurality of layers. <EOS>