maya wire render
DESCRIPTION
Alias .wire file being rendered inside Maya. issues of rendering a NURBS model which is built in precision, and that be delivered when rendering.TRANSCRIPT
Tips & Tricks Software: Maya Level: Intermediate Date: 18th Feb 2013
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Maya : Rendering Wire Data
In a workflow of Alias to Maya, we need to export data from Alias, which is more often than not wire data.
The good part about wire data is that it is NURBS surface inside Maya, which in trun makes one of the best surfaces compared to non‐NURBS…
However on closer look we see that the render does not seem to be good even if rendered as Maya Software render.
In close up the issue is more easily seen
It is important to understand the reason for the same. . . The render is “converting” the NURBS data to polygons/triangle in order for it to render. The good part is that we can see this render tessellation.
Tips & Tricks Software: Maya Level: Intermediate Date: 18th Feb 2013
P a g e | 2
Marked in red is the option to switch on the display of the render Tessellation. . . this is how the renderer is viewing the surface to render. . . if this surface is not upto the quality expected, one can enable the Advanced Tessellation, (circled in Blue) and modify the same.
All this is in the Maya Software render.
More often we use the Mental Ray Render
Mental Ray render Maya render
While the Mental Ray Render is relatively better that the Maya Render, there are still a fair bit of issues. As long as the “patches” are not too big, the issues are barely noticeable…
Tips & Tricks Software: Maya Level: Intermediate Date: 18th Feb 2013
P a g e | 3
However, bigger “patches” one can easily see the issue. Surfaces built from 7 degree curves seem to be affected the most…
one of the ways to resolve this is to split the surface (detach surface),
alternatively one can rebuild the surface, by changing the curve Degree or increasing the No. of spans
Tips & Tricks Software: Maya Level: Intermediate Date: 18th Feb 2013
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For this one has to work on individual surfaces, which may get cumbersome…that too only to get the right look…
A simple one click solution may work for most of the scenarios. . .Approximation Editor.
Select all the surfaces
In the NURBS Tesselation, Surface…click on Create….this will create a Mental Ray Surface Approximation. This can be then edited in the Attribute Editor.
Tips & Tricks Software: Maya Level: Intermediate Date: 18th Feb 2013
P a g e | 5
In this case the U & V Subdivisions were changed from 2 to 4. And rendered.
Please note there are different type of approximations…
The whole idea is not to edit/change the original shape by remodelling or rebuilding surface, but by improving, the way the renderer is viewing the data.