how to set vray as default renderer rhino

Check that the 'Texture Space' is singular (meaning that all the objects share the texture in the same way). Now, using the pop-up, set the 'Projection' to 'Box'. Switch to 'Texture Mapping' (pull-down at the top of the panel). To apply your texture in a uniform way, select all the surfaces that share the texture and then select the 'Object Properties' display. This is almost always wrong, producing mis-aligned, mis-oriented, and variably-scaled applications of the texture (see below). The default behavior in Rhino is to treat each surface as a separate object, stretching and orienting the assigned texture to fit. The important settings here are the projection or mapping type ( more detail), the Texture Space (usually OK by default), and the UVW Repeats which control how many copies of the texture are applied, and thus control the scale (but see additional discussion below). This will help you avoid changing texture mappings inadvertently. It is recommended that you name your textures (Under 'General') according to how they are used. If you need to access these properties, you almost certainly need to use the 'Custom' options, as shown at right. These determine the way in which a texture is applied ('wrapped') onto the object. In addition to Object Properties and Material Properties, every unique object in Rhino has Texture Mapping Properties.

TAPESTRY: The Art of Representation and Abstraction Rhino + V-Ray: Texture Mapping Controls

How to set vray as default renderer rhino