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bump mapping

Posted: Sun May 23, 2004 12:43 am
by openaff
I have both the blender 2.0 and 2.3 guides, and have been reading and experimenting, but I can't figure out bump mapping for the life of me.

Does blender actually have mesh displacement, or does it merely show up like a regular shaded texture? None of the methods from the book work, nor has any tweaking of the parameters. Am I missing something?

Using Blender 2.33 by the way.

Thanks

Posted: Sun May 23, 2004 1:10 am
by kAinStein
Blender has got bump mapping - you can find it in the material buttons. Add a texture to the material then you can find a button 'nor' under the 'map to' tab. It doesn't displace the mesh because it is bump mapping, not displacement mapping. Blender doesn't have any displacement mapping. At least not directly. There is a workaround with the noise tool in the edit buttons.

Posted: Sun May 23, 2004 1:56 am
by openaff
EDIT: Figured it out, thanks.

Hrm. I have a texturing book along side for reference, and in the bump mapping examples, the bump map gives it actual depth once rendered. In blender, as the guides specified and per your mentioning, I've tried the NOR buttons and their adjustments, but nothing special occurs; it's just like applying a regular flat texture over the mesh.

Posted: Sun May 23, 2004 3:45 am
by steve_t
belender does also support displacement mapping. Just click the "disp" button instead of "nor". It is a little trickier to get the hang of though.

-steve

Posted: Sun May 23, 2004 3:52 am
by SamAdam
the displacement works well if you have it setsmooth and have a very highpoly model, as it moves molys, not makes new ones.

Posted: Sun May 23, 2004 6:38 am
by matt_e
Release notes for the displacement mapping in 2.32:

http://www.blender3d.org/cms/Displaceme ... .37.0.html

Posted: Sun May 23, 2004 9:10 pm
by kAinStein
broken wrote:Release notes for the displacement mapping in 2.32:

http://www.blender3d.org/cms/Displaceme ... .37.0.html
Must have missed that one! :oops: Cool.... :D

Posted: Mon May 24, 2004 3:44 am
by Roja
So displacement mapping in blender is only viewable when you render the object? Is anyone planning on making real displacement modeling, so that, for instance, I can use a displacement map to make a flat plane into a mountain/terrain object, for it to become the actual mesh?

Posted: Mon May 24, 2004 4:17 am
by SamAdam
i am sure someone is thinking about it, and that may be coming soon, but we should get paint on displacements first.

Posted: Mon May 24, 2004 6:31 am
by gabio
hi guys, look for a python script, this is already done. but hard coder could be better of course.

Posted: Tue May 25, 2004 5:10 am
by openaff
Also, when applying a bump map, the texture is all screwed up with the camera angle not pointed directly at it.

For example, rendering a flat plane with a bump map results in a worthless render because the texture is "stretched" unless the view is straight at the plane; just try it with the default scene but replace the cube with a plane. It's driving me nuts, nothing seems to map the texture to the model reasonably. Am I missing something here?

Posted: Wed May 26, 2004 8:51 pm
by Carnivore
Roja wrote:So displacement mapping in blender is only viewable when you render the object? Is anyone planning on making real displacement modeling, so that, for instance, I can use a displacement map to make a flat plane into a mountain/terrain object, for it to become the actual mesh?
If you have the 2.3 manual, look at page 118. Otherwise, search the online documentation for "noise"

Posted: Wed May 26, 2004 9:15 pm
by jody