When you find Gillian's body, the floor (both stone floor and rug) were not upscaled, because the room uses a different lighting set (so subtle, you barely notice it) for the room because the door is open. I restored it to use the original so it looks decent.
I also added the option for players to make the scene more gruesome in case this scene was censored somehow, just like how the scene where Sephiroth stabs Cloud was (probably) censored. It makes no sense for there not to be blood in that scene, so it was probably done so the game could keep its Teen rating (more demographics, more sales). That, or the developers thought finding an older woman's bloody body might be too objectionable to Western people (likely also the reason a statue in the game was modified to resemble Mary less in the Western release as to not offend Catholics as much) and turn them off from the story, while they would be less objectionable to blood during Zack's death in the ending. FF7 and Crisis Core are not cheery stories, there are a lot of dark and grisly aspects to them, so some people like me might prefer this change.
This also makes the plot make a little more sense because it turns out Angeal did not kill his mother, but rather, she killed herself in suicide. Angeal's Buster Sword has no blood on it, so it could serve as foreshadowing. It's never explained how Gillian killed herself. Without the blood, you have to guess she used a cyanide pill or something, but why would she have that as a villager? In this edit, you can guess she killed herself with a knife or a gunshot and may be lying on top of the weapon. In case this scene was censored and there was intended to be blood, you could also guess it was seppuku, due to the Japanese influences of the story. Gillian killed herself due to her shame, and I got the sense the Hewley family were meant to evoke a traditional Japanese family, especially due to Angeal's constant talk of dreams and honor.
Because not everyone may like this change, this is not the default so in order to make the blood appear (like I said, it will only appears when Zack finds her body, not when he meets her for the first time), you must change a line in textures.ini so control+F in the notepad file:
Before:
00000000c469d38fc69a056e = /textures/environment/ground/000000002e67574e617ca713.png
After:
00000000c469d38fc69a056e = /textures/environment/ground/00000000c469d38fc69a056e.png