Render Images in Revit.
You have rendered an image from Revit and seen that the image size is very small and as a result the image quality is poor
Adjust the Image to the required size. For a Normal 3D View the image size is adjusted by adjusting the scale of the view, however for a 3D Camera Perspective view the crop region needs to be adjusted to increase the image size.
Follow the link to see a video on how to adjust the Image Size of a Camera View in Revit:
Remember: Using higher settings for Rendering will require more time to Render. Cloud Rendering may be a better solution if computer resources are being used up.
Follow the Link for more on Cloud Rendering: