A liner assembly for use in a combustor of a gas turbine engine, comprising: a support shell (210, 310); and a heat shield panel arrangement, the heat shield panel arrangement comprising: a first panel (216, 316) having a first rail (232, 332), the first rail (232, 332) having a first distal tip at a first cold side surface and a first angled outer wall (236, 336), the first distal tip having a first distal tip length and the first angled outer wall (236, 336) extending at a first cutting-angle from a first panel hot side surface to the first distal tip; and a second panel (218, 318) having a second rail (234, 334), the second rail (234, 334) having a second distal tip at a shelf surface and a second angled outer wall (238, 338), the second distal tip having a second distal tip length; the second angled outer wall (238, 338) extending at a second cutting-angle, different from the first cutting-angle, from the second distal tip to a second panel hot side surface, wherein the first distal tip length is less than the second distal tip length and wherein the first angled outer wall (236, 336) is arranged substantially parallel to the second angled outer wall (238, 338) with a gap (230, 330) formed therebetween; wherein the first panel (216, 316) and the second panel (218, 318) are disposed in an axial direction along a combustor and wherein the gap (230, 330) extends in a circumferential direction about a combustor; and wherein the support shell (210, 310) is configured to orient the first panel (216, 316) and the second panel (218, 318) at an angle (α) with respect to each other. for use in a combustor of a gas turbine engine, comprising: a support shell (210, 310); and a heat shield panel arrangement, the heat shield panel arrangement comprising: a first panel (216, 316) having a first rail (232, 332), the first rail (232, 332) having a first distal tip at a first cold side surface and a first angled outer wall (236, 336), the first distal tip having a first distal tip length and the first angled outer wall (236, 336) extending at a first cutting-angle from a first panel hot side surface to the first distal tip; and a second panel (218, 318) having a second rail (234, 334), the second rail (234, 334) having a second distal tip at a shelf surface and a second angled outer wall (238, 338), the second distal tip having a second distal tip length; the second angled outer wall (238, 338) extending at a second cutting-angle, different from the first cutting-angle, from the second distal tip to a second panel hot side surface, a support shell (210, 310); and a heat shield panel arrangement, the heat shield panel arrangement comprising: a first panel (216, 316) having a first rail (232, 332), the first rail (232, 332) having a first distal tip at a first cold side surface and a first angled outer wall (236, 336), the first distal tip having a first distal tip length and the first angled outer wall (236, 336) extending at a first cutting-angle from a first panel hot side surface to the first distal tip; and a second panel (218, 318) having a second rail (234, 334), the second rail (234, 334) having a second distal tip at a shelf surface and a second angled outer wall (238, 338), the second distal tip having a second distal tip length; the second angled outer wall (238, 338) extending at a second cutting-angle, different from the first cutting-angle, from the second distal tip to a second panel hot side surface, a first panel (216, 316) having a first rail (232, 332), the first rail (232, 332) having a first distal tip at a first cold side surface and a first angled outer wall (236, 336), the first distal tip having a first distal tip length and the first angled outer wall (236, 336) extending at a first cutting-angle from a first panel hot side surface to the first distal tip; and a second panel (218, 318) having a second rail (234, 334), the second rail (234, 334) having a second distal tip at a shelf surface and a second angled outer wall (238, 338), the second distal tip having a second distal tip length; the second angled outer wall (238, 338) extending at a second cutting-angle, different from the first cutting-angle, from the second distal tip to a second panel hot side surface, wherein the first distal tip length is less than the second distal tip length and wherein the first angled outer wall (236, 336) is arranged substantially parallel to the second angled outer wall (238, 338) with a gap (230, 330) formed therebetween; wherein the first panel (216, 316) and the second panel (218, 318) are disposed in an axial direction along a combustor and wherein the gap (230, 330) extends in a circumferential direction about a combustor; and wherein the support shell (210, 310) is configured to orient the first panel (216, 316) and the second panel (218, 318) at an angle (α) with respect to each other.