Tested a pigman farm on render distance 10 on single player (an exact copy of a world on realms, created in 1.13) and the pigman seem to spawn as they normally should. It isn't any noticeable difference from a render distance of 12. Render distance of 8 causes a noticeable change in spawns. If the render distance is 10 on realms, it has to be something else... ❓ - but it is definitely something about realms. Realms preset render distance is not 8... is it?!
Momo Taro
Tested a pigman farm on render distance 10 on single player (an exact copy of a world on realms, created in 1.13) and the pigman seem to spawn as they normally should. It isn't any noticeable difference from a render distance of 12. Render distance of 8 causes a noticeable change in spawns. If the render distance is 10 on realms, it has to be something else... ❓ - but it is definitely something about realms. Realms preset render distance is not 8... is it?!