Run Script
default {
state_entry() {
llSetTextureAnim(ANIM_ON|LOOP|SMOOTH, ALL_SIDES, 0, 0, 0, 0, 1.0);
}
}
Set PBR Material with visible emissive mask. (Preferably <1.0,1.0,1.0> Color)
Set Glow to 1.00
Set Alpha mode "blend"
Setting Opaque or Mask works as expected, setting Blend causes emissive part of the material to snap to zero and not animate.