艾瑞·斯诺的《冰雪与灰烬》

Iray 雪与冰效果套件包含一组着色器、道具以及一个主雪降系统，该系统可通过不同材质强度来模拟雪和冰的效果。 雪景：雪降系统采用横向交错的几何体来覆盖大片区域。每个面都具有独特的 UV 坐标，并通过反射贴图和次表面着色来模拟动态雪景。相较于全 3D 雪花而言，这种方式在性能方面成本更低，同时能覆盖更多场景区域。 道具：套件中还包含树木、雪堆和冰面贴图，可用于丰富场景内容。 着色器：套件内含配套着色器，可用于替代那些更适合呈现雪和冰效果的表面。这些着色器广泛运用了折射、后向散射、次表面散射（SSS）以及位移等技术，以实现逼真的效果。每种着色器均可进行平铺处理，且其修改不受 UV 坐标的影响

Iray snow & ice is a suite of shaders, props and a main snowfall system with varying material intensities to simulate snow and ice effects. Snow: The snowfall system uses staggered geometry on horizontal axis to cover a large area. Each face has unique uv co-ordinates and trans-mapped, subsurface shading to simulate snow in motion. This is less costly in terms of performance than full 3d snow drops, and covers much more ground. Props: Trees, snow piles and icy decals are included to populate your scene. Shaders: Supporting shaders are included and can be used to replace surfaces where snow and ice would be more feasible. The shaders make extensive use of refraction, back scattering, SSS and displacement to achieve realistic effects. Each shader can also be tiled and modified independent of UVs.