[SOLVED] Shadow on scaled object is stretched along the scaled axes. Bake GI.

I am using plane as floor and I scale the x or z axes to fit the spaces I need to fill. I noticed when plane doesn't have a x and y scale ratio of 1:1, the shadow on the plane will be stretch along the axes that is most scaled. This result in shadow being blur.

I was thinking it had to do with asset I was using but I did a test with basic plane and unity-made material and I have the same issue.

https://imgur.com/a/QyZpsFA

As you can see in this picture, the plane above as a scale ratio of 1:1, shadow looks good. The plane below as a scale ratio of 10:1 and the shadow looks stretch on the x axes.

Am I missing something?

I am using unity 2018.1.5f1.

 

Thank you for your answer, no I am using bake shadow. I had no idea this was expected behavior when using bake shadow. I have change my scene to only use uniform scale.

 

My guess would be that Unity doesn't adjust the initially created lightmap UVs when scaling an object. So what you are seeing is simply lack of resolution in that direction. You could try to reimport the object with adjusted lightmap UVs if that's feasible.

 

If you wish to use basic Unity objects(planes, cubes, spheres), I recommend you download and use the now free(and official Unity plugin) ProBuilder from either the PackageManager(on 2018) or the asset store(below 2018). It has great and simple tools to create and modify simple 3D objects. Automatic UV unwrapping(Editing the mesh will update the UVs and UV2s to match), and a UV editor if you wish to change anything manually.

Even for just testing I highly recommend using ProBuilder(and ProGrids if you want grid snapping).