Create line with glow/neon effect from shapefile (with BlenderGIS) and snap it to raster

Question

I'm sorry this is a really beginners question. So I have a shapefile as in here:

https://drive.google.com/drive/folders/1ISi20XX8BxSdHCXpB_z450GejczPgf4x?usp=sharing

I import the shapefile with the BlenderGIS Plugin. Now I would like to make this line have a neon-effect. However, I do not even see anything when I render it.

Before Render

I think two steps are important. The first is to create the mesh. I think this thread is useful for that.

1. Really create the mesh as discussed in here: https://github.com/domlysz/BlenderGIS/issues/233

2. Use something like the Bloom to get the neon-effect.

However, I am not sure if I am right about this and how to approach these steps particularly.

The thing is I really want to create these glowing lines as in here:

https://www.reddit.com/r/gis/comments/ptulj9/grand_rapids_mi_result_of_lidar_in_blender/

And as a last step (which is even more confusing to me), I'd like to put the shapefile on top of a raster layer such that it just lays above it. I think there is a snapping option but I am not sure if this is the best idea. There is also the possibility to extract the height values directly from a field within the shapefile. But what if I change the z-extrusion for the raster in Blender. I guess than it wont work anymore.

Answer 1

In the image you show, it looks like tubes that have an Emission shader as material, and the glow we see is actually the light that is projected onto the ground, not a kind of bloom. If you use Eevee, you'll need an Irradiance Volume to create such an effect, as Emission doesn't project any light in Eevee. That said you can still use the Bloom option to add more effect (it's in the Render tab). Also you'll need to choose Shadow Mode > None in the material so that the neon object doesn't project any shadow.