Texture Guided Realtime Painterly Rendering of Geometric Models

Abstract

We present a real-time painterly rendering technique for geometricmodels. The painterly appearance and the impression of geometricdetail is created by effectively rendering several brush strokes.Unlike existing techniques, we use the textures of the models tocome up with the features and the positions of strokes in 3D objectspace. The strokes have fixed locations on the surfaces of the modelsduring animation, this enables frame to frame coherence. We use vertexand fragment shaders to render strokes for real-time performance.The strokes are rendered as sprites in two-dimensions, analogousto the way artists paint on canvas. While animating, strokes mayget cluttered since they are closely located on screen. Existingtechniques ignore this issue; we address it by developing a levelof detail scheme that maintains a uniform stroke density in screenspace. We achieve painterly rendering in real-time with a combinationof object space positioning and image space rendering of strokes.We also maintain consistency of rendering between frames . We illustrateour method with images and performance results.