COMPRESSED THIT STACK FOR HARDWARE-ACCELERATED GPU RAY TRACING

Aspects presented herein relate to methods and devices for graphics processing including an apparatus, e.g., a GPU or CPU. The apparatus may configure a BVH structure including a plurality of nodes, the BVH structure being associated with geometry data for a plurality of primitives in a scene. The apparatus may also detect a set of hit child nodes for a current node of the plurality of nodes. Further, the apparatus may sort the set of hit child nodes based on the parametric distance value of each of the set of hit child nodes. The apparatus may also compress the node ID and the parametric distance value for each of an updated set of hit child nodes based on the sorted set of hit child nodes. The apparatus may also store the compressed node ID and the compressed parametric distance value for each of the updated set of hit child nodes.