We propose a new method for simulating and rendering watery paint, which provides artists with a tool to produce watercolour-like textures on 3D models. Our particle-based system replicates most effects and techniques associated with watercolour, interactively and intuitively, as it is based on a physical fluid simulation. We show how our system can be applied to 3D surfaces by accurately compensating for distortions in the surface parametrisation.

Radiance fields are a promising alternative to conventional 3D representations in the domain of novel view synthesis, with recent research achieving truly impressive photorealistic view synthesis results. In this paper, we deal with the concept of non-photorealistic rendering in the context of radiance fields, for generating more stylistic captures of real-world objects. We discuss the suitability of inverse rendering as a stepping-stone to traditional shading and edge detection, and contribute a new algorithm specifically for outline detection in radiance fields.