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This page provides information on the extra V-Ray attributes that can be= added to XGen Interactive Groom Splines.
The XGen Interactive Groom Splines Attributes can be used to fine tune t= he rendering of XGen splines (hair) with V-Ray. They allow you to control t= he hair tessellation during render times. To apply it select the descriptio= nShape node and go to Attributes > VRay menu = in the Attribute Editor.
UI Path: ||Select descriptionShape|| > = Attribute Editor > Attributes menu > = VRay > Hair Geometry
Dynamic Hair Tessellation =E2=80=93 When enabled, = V-Ray dynamically changes the subdivision of the hair based on the distance= to the camera. This means that strands that are closer to the camera are s= ubdivided more times than strands that are far away. This allows for a bett= er memory utilization.
Segment length (px) =E2=80=93 When the Dynamic Hai= r Tessellation is enabled this parameter controls the size of the segments = generated by the subdivision. A value of 4 means that a segment is going to= be 4 pixels long in the final image. This way segments that are far away f= rom the camera are going to be larger in real world units.
Min pixel width =E2=80=93 Sets the minimum pixel w= idth of each hair strain to help ensure samples are taken consistently betw= een pixels. A value of 0 means no minimum width is applied, but increa= sing it helps make sure each strain is consistently rendered. This addition= al calculation increases render times, but smooths the hair width. Note: Va= lues are limited to 2. Larger values (closer to 2) can significantly increa= se render times.
Max tessellation =E2=80=93 Allows the user to limi=
t the number of segments when hair is dynamically tessellated. When set to&=
nbsp;0 (default), V-Ray doesn't limit the number of segments.=
When set to a value greater than 0, each hair strand is dyna=
mically tessellated but contains no more than the specified number of segme=
nts. This can be helpful in reducing memory usage.