The movies like the "Avathar" are a good example of the stunning visual effects that the animation could bring into a movie. The 3D wireframe models are converted to 3D photorealistic images using a process called the rendering. This rendering process is offered as a service in the cloud, where the animation files to be rendered are split into frames and rendered in the cloud resources and are popularly known as Rendering-as-a-Service (RaaS). As this is gaining high popularity among the animators community, this work intends to enable the animators to: (a) Gain basic knowledge about Rendering-as-a-Service (RaaS). (b) Understand the variety in the RaaS service models through the taxonomy (c) Explore, compare and classify the RaaS services quickly using the tree-structured taxonomy of services. In this paper, the various characteristics of the RaaS services are organized in the form of a tree to enable quick classification and comparison of the RaaS services. To enhance the understandability, three popular RaaS services have been classified and verified according to the proposed tree-structured taxonomy.

Cloud services that provide a complete environment for the animators to render their files using the resources in the cloud are called Cloud Renderfarm Services. The objective of this work is to rank and compare the performance of these services using two popular Multi Criteria Decision Making (MCDM) Algorithms namely the Analytical Hierarchical Processing (AHP) and SAW (Simple Additive Weighting) methods. The performance of three real time cloud renderfarm services are ranked and compared based on five Quality of Service (QoS) attributes that are important to these services namely the Render Node Cost, File Upload Time, Availability, Elasticity and Service Response Time. The performance of these cloud renderfarm services are ranked in four different simulations by varying the weights assigned for each QoS attribute and the ranking obtained are compared. The results show that AHP and SAW assigned similar ranks to all three cloud renderfarm services for all simulations.

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