Does normal map contains height information? Because it stores x,y,z axis information, but is the z axis equals to height information? But some comments I saw said that normal map does not contain height information, then what the z axis is representing?
Why does bump map is ‘directionless’? From my perspective, they store the height information in black and white. With that information, how does the direction of the bumps cannot be retrieved? I tried to create a simple bump map example to show what I am trying to ask. The below bump map only has a white rectangle, so the white will be pulled outwards and the black will be push downwards. But isn’t that we can already know the direction by the white and black data? Such as the direction that I marked with green arrows, which shows the 5 direction of the faces for the rectangle (1 top face and 4 side faces).
- Many people claims that normal map and bump map are nearly same, but the below normal map and bump map has quite a high amount of differences, so how are they nearly the same when there could be so much differences between them?
I know the difference between bump map and normal map are probably asked and answered by many times, but I don’t really find any answers that could answer the questions that I have asked above. I sincerely feel sorry if there are repetitive question asked.
Below are some articles and sites I have searched, but I feel like there are conflicts between them so I wanted to make the concept clear. https://www.pluralsight.com/blog/film-games/bump-normal-and-displacement-maps https://forums.cgsociety.org/t/normal-vs-bump-always-better-to-use-normal/1410917/52 https://blender.stackexchange.com/questions/ask
Thank You So Much For Helping