The default is a black background. The object shading is very crude, you seem to have only two colours, with light or without. The edges are very jagged. WIRL plug-in Background can be set in the browser. Colour interpretation and shading is poor.
Movement is smooth.
Microsoft VRML plug-in. Background is light blue by default. Shading is gradual, giving a much better appearance of lighting effects. Colours are much brighter. Transparency does not appear to work.