A method of controlling rendering of a plurality of computer images, the method comprising: providing a plurality of first instructions to be processed at a plurality of first computers, wherein the plurality of first instructions are for rendering a first computer image of the plurality of computer images; providing a plurality of second instructions to be processed at a plurality of second computers, wherein the plurality of second instructions are for rendering a second computer image of the plurality of computer images; receiving a user request for a change; and in response to receiving the user request: regenerating the plurality of first instructions based on the user request; providing first delta information to be processed at the plurality of first computers, the first delta information based on a difference out of a comparison between the provided plurality of first instructions and the regenerated plurality of first instructions; regenerating the plurality of second instructions based on the user request; providing second delta information to be processed at the plurality of second computers, the second delta information based on a difference out of a comparison between the provided plurality of second instructions and the regenerated plurality of second instructions; receiving first rendering results from the plurality of first computers, the first rendering results corresponding to the first delta information; and receiving second rendering results from the plurality of second computers, the second rendering results corresponding to the second delta information. providing a plurality of first instructions to be processed at a plurality of first computers, wherein the plurality of first instructions are for rendering a first computer image of the plurality of computer images; providing a plurality of second instructions to be processed at a plurality of second computers, wherein the plurality of second instructions are for rendering a second computer image of the plurality of computer images; receiving a user request for a change; and in response to receiving the user request: regenerating the plurality of first instructions based on the user request; providing first delta information to be processed at the plurality of first computers, the first delta information based on a difference out of a comparison between the provided plurality of first instructions and the regenerated plurality of first instructions; regenerating the plurality of second instructions based on the user request; providing second delta information to be processed at the plurality of second computers, the second delta information based on a difference out of a comparison between the provided plurality of second instructions and the regenerated plurality of second instructions; receiving first rendering results from the plurality of first computers, the first rendering results corresponding to the first delta information; and receiving second rendering results from the plurality of second computers, the second rendering results corresponding to the second delta information. regenerating the plurality of first instructions based on the user request; providing first delta information to be processed at the plurality of first computers, the first delta information based on a difference out of a comparison between the provided plurality of first instructions and the regenerated plurality of first instructions; regenerating the plurality of second instructions based on the user request; providing second delta information to be processed at the plurality of second computers, the second delta information based on a difference out of a comparison between the provided plurality of second instructions and the regenerated plurality of second instructions; receiving first rendering results from the plurality of first computers, the first rendering results corresponding to the first delta information; and receiving second rendering results from the plurality of second computers, the second rendering results corresponding to the second delta information.