Another way to work around low spec is to render by layer, so background -> optional objects -> characters -> foreground, and then compose.
Main problem is additional work that has to be done, so depending on purpose it may be ok or not, but that is basically professional workflow that allows to change each element of VFX without the need to re-render everything and optionally crank up details on specific parts.
Main problem is additional work that has to be done, so depending on purpose it may be ok or not, but that is basically professional workflow that allows to change each element of VFX without the need to re-render everything and optionally crank up details on specific parts.