A transparency grid, common with photo editing software, has been added to Build's image previews to fix a couple issues.

1. Fixes an issue where white images are invisible due to blending in with the white background
2. Fixes an issue where you can't tell if an image has a white background in areas needing transparency

For example, prior to this change this VMA logo was completely invisible. While still not entirely legible, you can at least now tell that there is an image, what the image is, and that it has transparency.

When an image doesn't contain transparency, here this image has a white background, the transparency grid won't be visible at all.