Throughout the course I have been taking with Ben I have noted a consistent issue with dragging and dropping my images or sprites into a scene-view. As I have tried to perform this function I have often found that when trying to place an image into a scene-view or the hierarchy my mouse-cursor would change to the circle with a diagonal line through it informing me that the function was not being allowed.
There are two reasons for this based on the research I have done into this matter.
I…
The first possible reason is that your scene may be defaulted to a 3D view, which several posters responding to other Unity3d students have noted that you CANNOT move sprites\images onto such a view.
To rectify this, ensure that your 2D option button at the top of your scene-view in the options-bar is DEPRESSED so that your scene-view is in 2D mode.
In addition, go into the master “Edit” option, select “Project Settings”, select “Editor” and change the “Default Mode” to 2D.
This should rectify your project settings to the proper 2D mode.
II…
If you are finding that the the image\sprite cannot be moved to a scene-view as described after ensuring that your project and scene modes are set to 2D the other issue could be Unity3d “import” corruption of your images.
For the “Block Breaker” game development, I followed Ben’s suggestions on how to make my own brick textures (They did not come out as well as Ben’s but I was more interested in also learning how to handle Corel’s PaintShop Pro, which I am slowly becoming more adept with.).
Using Corel’s PaintShop Pro, I created all three images to the correct specifications and saved them as “png” files. All of these image files were completely readable so I imported them into Unity3d. The imports seemed to work as the images showed up in my “Assets” folders as expected. However, they could not be dragged to a scene-view without getting the “prevention” mouse cursor.
To rectify this, simply delete all such images and re-import them to Unity3d.
THIS APPEARS to be an issue with Unity3d as the import seemingly corrupted the images during the import. Re-importing clean images should resolve the issue.
