Method for managing image data in a vehicle lighting system (SYS), the lighting system comprising: - at least one lighting module (MOD) able to project lighting functions on the basis of compressed image data, and - a multiplexed CAN-protocol or CAN-FD-protocol bus (CAN) for transmitting compressed image data to said at least one lighting module (MOD), the method comprising the following steps: - receiving an instruction to trigger a first lighting function (ADB) from the vehicle lighting system (SYS); characterized in that the method comprises the following steps: - receiving an instruction to trigger a second lighting function (RW) from the vehicle lighting system (SYS), in order to generate the second lighting function (RW) at the same time as the first lighting function (ADB); - determining, in order to generate said first lighting function (ADB) and second lighting function (RW) at the same time, a compression rate (TxCompReq) required to transmit the image data on said multiplexed bus (CAN); - comparing the determined compression rate (TxCompReq) with a predetermined compression rate value (Tx0); wherein, when the determined compression rate (TxCompReq) is greater than or equal to said predetermined value (Tx0), the method comprises the following steps: - compressing the image data of the first function (ADB) and second function (RW); - transmitting the compressed image data to said at least one lighting module (MOD) in order to generate the first lighting function (ADB) and second lighting function (RW) at the same time; and wherein, when the determined compression rate (TxCompReq) is less than said predetermined value (Tx0), the method comprises the following steps: - compressing the image data of just one of the first lighting function (ADB) and second lighting function (RW) ; - transmitting the compressed image data to said at least one lighting module (MOD) in order to generate just one of the first lighting function (ADB) and second lighting function (RW). - at least one lighting module (MOD) able to project lighting functions on the basis of compressed image data, and - a multiplexed CAN-protocol or CAN-FD-protocol bus (CAN) for transmitting compressed image data to said at least one lighting module (MOD), - receiving an instruction to trigger a first lighting function (ADB) from the vehicle lighting system (SYS); characterized in that the method comprises the following steps: - receiving an instruction to trigger a second lighting function (RW) from the vehicle lighting system (SYS), in order to generate the second lighting function (RW) at the same time as the first lighting function (ADB); - determining, in order to generate said first lighting function (ADB) and second lighting function (RW) at the same time, a compression rate (TxCompReq) required to transmit the image data on said multiplexed bus (CAN); - comparing the determined compression rate (TxCompReq) with a predetermined compression rate value (Tx0); - compressing the image data of the first function (ADB) and second function (RW); - transmitting the compressed image data to said at least one lighting module (MOD) in order to generate the first lighting function (ADB) and second lighting function (RW) at the same time; - compressing the image data of just one of the first lighting function (ADB) and second lighting function (RW) ; - transmitting the compressed image data to said at least one lighting module (MOD) in order to generate just one of the first lighting function (ADB) and second lighting function (RW). <EOS>