DTM texture bed - need minor help

[domer1322]

I attached an image of a texture bed for an asphalt driveway that shows irritating green lines from the DTM interfering with the pavement rendering. How do I get rid of these lines?

The image is rendered in Renderworks, VW 2015, using DTM set to 3D extruded contours at 4" intervals. I tried to raise the 'Z' value of the site modifier for the pavement, but it didn't make any difference.

[CipesDesign]

After achieving what is desired, simply make the class Site/DTM/Modifier invisible. The ugly lines will all go away. Just remember that if you should need to update the Site Model at a later time (and I pretty guaranteed that you will) you'll need to turn that class back on before Updating. HTH's.

[zoomer]

What you see on screen are Faces that touch and/or overlap, as you said.

Raise the Z of the pavement will help at some time, maybe at 3 foot, so not

desired.

The reason why the Faces overlap is the poor triangulation of the pavement

surface. The many long and thin triangles that come from the many arc points

of the rounded edges. These meet some other Vertex at their end that is quite

arbitrary and has another Z-value or maybe the long triangles cross so many

contour lines that they no more follow the terrain slope.

You could try to cut the pavement into pieces to try to control how mesh triangulation

happens, but that doesn't work as VW can't stand touching or overlapping site

modifiers.

So the next thing would be to cut more vertices into your straight modifier

edges to try to better the triangulation of the modifier surface,

which is a bit of an try and error.

[zoomer]

make the class Site/DTM/Modifier invisible.

It's that easy ?

VW will then use only one surface to render,

with the plan cut out faces just using a different material ?

If so, very good to know !

Edited April 12, 2016 by zoomer

[CipesDesign]

Oops. Apologies for misreading the original question. My suggestion will get rid of the line of the Site Modifiers, but not the annoying green which intersects the Texture Bed. I have seen this before and it will sometimes cure itself if you fix any Site Model Errors (overlapping modifiers for example) and then Update. In other instances you can fix it by adding a Pad under the offending portion, to make it flatter.

If you can post the file I might have time to take a look later today.

[zoomer]

Pity, i liked your solution more than mine ...

[domer1322]

Zoomer and Cipes: thanks for the tips. However, I tried adding more vertices to the asphalt site modifier and to the building pad and it doesn't have much (or any) affect. As far as I can tell, I have no conflicts between intersecting site modifiers. I raised the 'Z' value of the asphalt site modifier to 5' then to 15' and neither movement made any difference. In the meantime, I discovered the lines disappear when using "3D triangulated contours" instead of "3D extruded contours" so I guess I'll just use that as a work-around.

Also: I didn't post the file because it is pretty darn big (263 Meg).

[zoomer]

I think you will maybe have problems only with touching site modifiers when these

have different Z-heights.

It might not be nice to have to move there Vertices and Edges away from each other

but at least it will make no difference for the resulting terrain model.

Does the Asphalt have a low thickness ?

Would it work when cutting 1 m deep in the terrain and creating a Volume (?)

Generally I would use "Simplify Polyline" Command to reduce data.

Best not using arcs for not so important geometry but polygons, as the arc

resolution will be global for all your elements by 2D/3D resolution settings.

Just some ideas ....

Edited April 13, 2016 by zoomer

[J. Wallace]

If this is a hardscape object you could increase the thickness which might help.

I have found this type of work to be a major pain.

Edited April 13, 2016 by J. Wallace