Volume rendering is often used for 3D volumetric datasets visualization.It can generate high quality images

but can not render volumes and polygons combined scenes.Among many currently available techniques of visualizing hybrid scenes

some can render volumes and triangles combined scenes

but can not process geometric points and lines.To correctly render these complicated hybrid scenes

a ray casting based algorithm using SIMD and software acceleration techniques is presented.The algorithm has three types of rendering order

each of which has its own advantages and drawbacks for different applications.It can be adopted in parallel and perspective projection for many applications.Experiments show that the algorithm can properly visualize volumes

polygons

lines and points combined scenes

and rendered images have high quality and its rendering speed is very fast.