This is what it looks like in Blender:
Here is the texture, baked, UV unwrapped, and saved as PNG:
When I upload it to Roblox Studio as FBX, this is what it looks like:
robloxapp-20240218-1936330.wmv (466.3 KB)
If you look closely at the dress in Roblox Studio, the fabric from the texture is visible, it’s just the color that is incorrect. it’s supposed to be white, not red green, and blue