Model Viewer crashes

[The chaser]

The size of the model doesn't matter. Follow this:

-Make the material in Blender and assign the texture, as you probabily did. In the texture menu, go to Image or Video and open your diffuse texture.
-Then, open the Material Editor (in the redist folder) and make a soliddifuse with:
-Diffuse: This is the normal texture (eg sand texture)
-Nrm Map: This is optional, but I'm sure you have it. It shows like some pink/purple color with som yellow edges.
-Specular (spec) map: This determinates how it shines. I don't mind about this.

Put all your textures inside the folder of your Landscape, just like this:

Redist/Static_objects/Your_landscape

With:

Land.dds
Land_nrm.dds
Land_spec.dds
Land.mat (The file created with the material editor)
Land.dae (the landscape model)