Why was the animation in the Sword and Sword God Realm different from the novel?

There were some differences between the animation and the novel in the Sword and Sword God Realm as follows: 1. Storyline: The storyline of a novel is different from that of an animation. The plot of the novel was more detailed and included more details and character settings. The animation was more concise and mainly told the story of the main character, Kirito, and the other characters, as well as their adventures in the Sword God's Domain. 2. Character image: The character image of the animation and the novel is also different. The characters in the novel were more three-dimensional and full. Each character had its own unique personality and background story. The animation was more flat, mainly showing the appearance and personality of the character, and less involved the background story of the character. 3. Plot setting: The plot setting in the Sword and Sword God Domain was quite unique. It described the interaction between a virtual reality world and the real world. There were also differences in plot settings between animation and novels. Animation focused more on describing the battles and adventures between characters, while novels focused more on exploring the secrets and humanity of the virtual reality world. 4. Narrative-style: The narrative style in the Sword and Sword God Realm was quite unique. It used a multi-perspective narrative style to allow the readers to have a deeper understanding of the plot and characters of the story. The animation was simpler and more straightforward, using a linear narrative that focused more on showing the battles and adventures between the characters. Therefore, there were differences between the animation and the novel in terms of storyline, character image, plot setting, and narrative.