I imported an FBX model of an object in Blender 3.0.0 ( a 3rd party model, does not have any textures included). The object shows up fine in the Viewport and vertices are showing up in edit mode
I need to add a image texture to the object, so I created a material, provided the image texture, selected specific vertices of the object and assigned to the material
Now I need to UV map the vertices to specific points in the image. This is where I am stuck. I selected the vertices in Edit mode, then I opened up the UV Editor window, and no vertices show up. I pressed the U key, and unwrapping does not really happen.
I opened the texture image in the UV Editor and tried unwrapping again, no luck. The selected vertices just won't show up. The FBX model has a bunch of triangles, almost no quads but I guess that should not be a problem at least for UV mapping. Also, after importing the FBX model (and before any UV mapping effort), I scaled it to 100x to fit other objects in the scene.
When I render, I see the object getting the color of the image texture, so material assignment is probably happening fine. But I need to have specific portions of the image texture to be mapped to specific vertices and that's where I have the issue. UV mapping is working for all the other objects in the scene. Weird thing is, for all the other objects, I see the "UV Selection Mode" and "UV Sync Selection" buttons, but for the problem object, I don't see those buttons in the top right of the UV editor.