can somebody help me for understanding what is the difference between normal bump and bump by image for 2 kinds of bumps and the difference between them?
I’m sure you will get a more detailed answer but basically normal maps are RGB and so contain more information, specifically about the x,y,z axis. Regular image based bump maps use b&w info to create the height appearance.
normal change the normal in rendering , normal decided by R/G info , by flip r or g to change normal
bump change the height in rendering (just for light , not real) , normal not change , use grayscale info ,no filp
normal is smoother than bump , bump show like relief
if use a grayscale image in normal , result will be unexpected
I am very newbie, but I immediately learned how to distinguish a normal map; They are bluish and pinkish, really unique and beautiful. For some reason the blue seems to be more prevalent. My guess is that blue carries positive numbers info.
-Ramon F Herrera
blur is the Z direction , if not need to rotation normal , it will be blur