FOSS gamedev and creative worlds

How do I make bump map Textures. Is there a way to do it in gimp or do I have to make them by hand.

You can do it in gimp. or in 0.4.8 when it comes out if it has the feature.



look at that. from a scaled and smoothed desert stone to the chunky stone you might see in reality

[spoiler=how 2 in gimp]







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Oh cool. So how do I get the picture to be red and blue?

???
Do you mean how to make an image one certain color?
could you tell me what you mean?

Bump mapping in minetest needs blue and red images. Red for elevated and blue for de-elwvated areas. Look at texture packs with bump mapping and you will see what I mean.

jojoa1997 wrote:Bump mapping in minetest needs blue and red images. Red for elevated and blue for de-elwvated areas. Look at texture packs with bump mapping and you will see what I mean.

these are called normals.

I will look into it. :)

I didn't know what you meant at first.

The colors in a normal map refer to the relative change in elevation from one pixel to the next.

The pixel's green channel (as in RGB) is used for the Y axis, red for the X axis, and blue for the Z axis (depth). This allows a normalmap to store three independent vectors for each pixel. This is also why they have to be PNG or some other lossless format - the channels must not blur/blend together, as would happen with a JPG image.