influenced the exchange of blaster fire. Like in Ran, color-coding and an "onscreen sense of direction" of blaster fire are used to depict opposing forces. In the Star Wars original trilogy, rebels employed red blaster fire and often attacked from the left, while the Empire also employed red blaster fire, using green blaster fire only with TIE fighters, and attacked from the right. In Star Wars: Episode II – Attack of the Clones, the second film of the prequel trilogy, the color and the direction were reversed. In that film, the Republic employed green and blue blaster fire and attacked from the right, while the Separatists employed red blaster fire and attacked from the left. In-universe technology The inner workings of blasters essentially create particle beams to pierce, melt and disintegrate targets. When the trigger is pulled, high-energy gas is excited by a power cell and converted into plasma. This plasma is fired through collimating components in the barrel such as galven circuitry and focusing lens to emerge as a coherent energy bolt held together via magnetic bottle effect. However the bolt's inherent instability is a limiting factor in precision aiming, and it will start to lose coherence while traveling to the target as the plasma dissipates. The longer the barrel the more collimating components it can be fitted with to rectify these problems for increased range and accuracy. Prolonged use will also result in overheating the weapon, which can be counteracted by utilizing alloys with greater heat resistance, and employing heat-dispersal vents and cooling packs and compressors. Blaster weaponry can vary the intensity of their output, generating bolts of greater destructive power but with corresponding trade-offs. For example, the DC-15 blaster rifle used by clone troopers can blast a hole wide in a wall made of the fictional material ferroconcrete when set on maximum power, but doing so consumes more gas and reduces its ammunition capacity from 500 shots to 300. A more powerful blaster bolt also generates more recoil which can make it more difficult to use the weapon. Different types of gas are used as blaster ammunition, such as the fictional Tibanna gas found in the lower atmosphere of Bespin used to power weapons and other devices. This also results in different coloration depending on the gas used. The least expensive type of gas generate red-colored particle beams, while more expensive gases produce a green particle beam.