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View Full Version : simple NORMAL map excercise turning into nightmare



nnasr.rm
02-06-2018, 04:32 AM
hi,
i always thought that normal maps are just like bump maps but more extruded, how ever on this website... http://cpetry.github.io/NormalMap-Online/ , i can see that the normal map does actually PUSH out the geometry, so when i see it side view, there is an extrusion. How is this achieved in lightwave? because i tried to plug in the texture that i downloaded from this website into the nodal displaccment modifer. I attached of what i am doing as a sequence.

Sensei
02-06-2018, 05:20 AM
From that website pick up Displacement (gray-scale one), export it,
in Displacement Node Editor add Image node (don't forget about disabling Color Spaces!),
and use it as source to Math > Vector > Scale,
vector take from Input > Normal.

rsfd
02-06-2018, 07:01 AM
@nnasr.rm

a Normal Map does not alter the geometry.
On that website, de-select "Displacement" (and if you like also "Ambient Occlusion / AO" and "Specular") above the rotating Cube (or else object) and have a look at the result.
With only the Normal Map applied, the Cube remains a Cube.
So your initial idea about Normal Maps was in deed correct.

For a Normal Map, use either "2D Textures > Normal Map" or "2D Textures > Normal Map Sampler" Nodes and connect the appropriate inputs.
Set the Normal Map to "linear" in Image Editor and consider the correct texture mapping (Planar, Cylindrical, UV,…).

It's the Displacement Map, which alters the actual geometry.
For using a Displacement Map, follow Sensei's instruction.