Shadow Rendering for Meso-structure Surface Based on Height Gradient Map

It is challenging to model the geometry of the objects with meso-structure surfaces,which have complex model structures and lead to poor performance in shadow rendering.This paper presents a real-time shadow rendering method based on height gradient map.To achieve the real-time rendering,we propose a meso-structure description model,which maps the meso-structure height field to the low-resolution model using textures.We also introduce a meso-structure height gradient map(MHGM) to create local apex sets of visible points.In the shadow rendering stage,the detailed shadow is generated by computing the occlusion of gradient-space local apex sets in real time.Our algorithm runs entirely in image space,and uses deferred shading and graphics pipeline to show the self-shadowing effect of deformable objects in dynamic scenes.