Avoid using tiles as shape further (for performance).
Avoid using tiles as shape further (for performance).

This saves about 10% CPU time on pressure_tunnel,
and about 3% on the default scenario.

Lasercake/Lasercake,idupree/Lasercake,elidupree/Lasercake,elidupree/Lasercake,idupree/Lasercake,Lasercake/Lasercake,elidupree/Lasercake,idupree/Lasercake,elidupree/Lasercake,Lasercake/Lasercake,Lasercake/Lasercake,idupree/Lasercake,idupree/Lasercake,elidupree/Lasercake,elidupree/Lasercake,idupree/Lasercake,idupree/Lasercake,elidupree/Lasercake,Lasercake/Lasercake