The `image_get_gpu_texture` didn't use the iuser->view_index but recalculated the requested view again. This lead to inconsistent behavior when switching between multi view textures or stereo textures. This has been fixed by ensuring that the `iuser->view_index` is always used. An Image has only place to store 2 view textures. This is done for right/left eye compositing. A multi view texture can have more views. This would lead to reading and writing to unallocated space. When a multiview texture is requested that is larger than 1. It will always be cached as being the first eye. The `gpu_view` of the Image is also used as a cache key to check this.