Fügt ein Materialpixel an der angegebenen Position in der angegebenen Geschwindigkeit ein.
If the target position already contains material of the same density as the inserted material, the engine will search upwards for a proper insertion position.
If the target position is outside the landscape (either because one of the parameters is outside the map or because insertion position search found such a position), no material is inserted. The function still returns success if the out-of-landscape position has the same or lower density than the inserted pixel. Out-of-landscape densities are controlled by *Open-parameters in the
Scenario.txt [Landscape] section.
For the sake of material insertion calculations, all densities above C4M_Solid are considered the same.