A liner panel assembly to be mounted to a support shell (68, 70) of a combustor for a gas turbine engine, the liner panel assembly comprising: a forward liner panel (72A, 72B) having a cold side and including an aft circumferential rail extending from the cold side; an aft liner panel (74A, 74B) having a cold side and including a forward circumferential rail extending from the cold side; wherein the circumferential rails (124a, 122b) are non-perpendicular with respect to the cold side; wherein, when the forward liner panel (72A, 74A) and the aft liner panel (74A, 74B) are aligned, the aft circumferential rail of the forward liner panel (72A, 74A) is adjacent and parallel to the forward circumferential rail of the aft liner panel (72B, 74B); wherein an interface passage is formed between the aft circumferential rail of the forward liner panel (72A, 74A) and the forward circumferential rail of the aft liner panel (72B, 74B); wherein a multiple of effusion passages penetrate through each of the liner panels (72A, 72B, 74A, 74B); wherein each of the multiple of effusion passages of the forward liner panel (72A, 74A) is parallel to the aft circumferential rail of the forward liner panel (72A, 74A); wherein each of the multiple of effusion passages of the aft liner panel (72B, 74B) is parallel to the forward circumferential rail of the aft liner panel (72B, 74B); wherein the forward circumferential rail of the aft liner panel (74A, 74B) includes a discontinuous rail end surface of a distal end thereof, and wherein the discontinuous rail end surface is discontinuous and is only intermittently in contact with the respective support shell (68, 70) when mounted to said support shell (68, 70), to provide for a flow of cooling air therethrough. a forward liner panel (72A, 72B) having a cold side and including an aft circumferential rail extending from the cold side; an aft liner panel (74A, 74B) having a cold side and including a forward circumferential rail extending from the cold side; wherein the circumferential rails (124a, 122b) are non-perpendicular with respect to the cold side; wherein, when the forward liner panel (72A, 74A) and the aft liner panel (74A, 74B) are aligned, the aft circumferential rail of the forward liner panel (72A, 74A) is adjacent and parallel to the forward circumferential rail of the aft liner panel (72B, 74B); wherein an interface passage is formed between the aft circumferential rail of the forward liner panel (72A, 74A) and the forward circumferential rail of the aft liner panel (72B, 74B); wherein a multiple of effusion passages penetrate through each of the liner panels (72A, 72B, 74A, 74B); wherein each of the multiple of effusion passages of the forward liner panel (72A, 74A) is parallel to the aft circumferential rail of the forward liner panel (72A, 74A); wherein each of the multiple of effusion passages of the aft liner panel (72B, 74B) is parallel to the forward circumferential rail of the aft liner panel (72B, 74B); wherein the forward circumferential rail of the aft liner panel (74A, 74B) includes a discontinuous rail end surface of a distal end thereof, and wherein the discontinuous rail end surface is discontinuous and is only intermittently in contact with the respective support shell (68, 70) when mounted to said support shell (68, 70), to provide for a flow of cooling air therethrough.