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Blender not applying image as Material

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10
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germany
Good evening,
After spending a few hours creating a 3d model in a CAD program, I exported it as an .stl file.
Then I imported it into blender and saw that the entire mesh is made out of polygons. Not a big deal I thought.
I went on to applying the textures. Now there is one texture I need to have as an image. It is 1024x1024px large and in the png format.
When I apply it trough the MSFS Material Params, the selected area just becomes gray. That is of course not intended. On other models it works perfectly.
How do I apply the image correctly and is there a methode of tiling images (as a material)?
I will include the .blend file and the texture file (Note: The texture is not really finished yet, but I want to see how it looks on the object).
Thank you!
img1.png
 

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Have you checked your UV mapping? You need to unwrap your model before the image is applied correctly
 
Have you checked your UV mapping? You need to unwrap your model before the image is applied correctly
I have now unwrapped the model and reassigned the texture, but it is still not working correctly.
Did that by pressing U and then selecting unwrap.
 
This will not work unless you defined the seams where the unwrapping function "Cuts" the model. You could try hitting U and then "smart UV Project" but even then you will have to adjust the UV islands by hand. If the texture only applies to the roof, I d suggest selecting only the roof faces, going to top View and then Press U and select "project from view" and then resize the UV island in the UV editor to match your image. If you want the texture to be tiled / repeated, you have to scale the UV island to be larger than the image boundaries.
 
Btw your models geometry is not optimal. Those long triangles will most likely create lighting artifacts in MSFS because the gltf format MSFS uses doesn't "like" long faces.
 
Btw your models geometry is not optimal. Those long triangles will most likely create lighting artifacts in MSFS because the gltf format MSFS uses doesn't "like" long faces.
Thank you for the reply above. I will try that out tomorrow. Is there an easy way to fix the triangles´?
 
you could try adding loop cuts but I don´t know if they will apply correctly with this geometry. Or maybe selt all faces and use "subdivide" to make them smaller.
 
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