Bump Maps...Use?

[bobbystahr]

Here's a really dumb question. I was just reading another thread where the poster mentioned applying texture and bump maps to an obj....well how the heck do you control and use bumps....a network screen grab of a ter or obj loaded with just a colour and bump map applied would go a long way in explaining this to dumb ol me...LOL

[§ardine]

I haven't messed around with adding bump maps to objects yet but I have added color to them.
maybe this will get you started:

Add your object and select it in the objects list on the top left of TG2. The "edit the internal network of this node" button (circled below) will show you the network seen to the right. opening up the "Material" node will give you options to edit the properties you are looking for.

[attach=#1]

What we have been told is that any displacement added to objects needs to be very small other wise it causes problems. I also recommend that you save your .obj as a .tgo format in TG2 and add the new format instead of the .obj for stability reasons.

A search of this forum should answer most of your question though on adding shaders to your object.

hope this helps (I'm not the best at being clear) 

[bobbystahr]

Think I gotcha...know bout the internal network, just haven't explored it much yet....but I understand displacement=bump?...so bump is an irrelavant thought as smart displacement will give the mesh effect whereas bump doesn't distort the mesh, just the way it uses light info.Thanx and if I'm way off base pleeeease correct me...LOL...it'll help with my renders which are a bit confused at the 'mo

[§ardine]

this might help as well:

This is a problem we're aware of. Using displacement on objects can be problematic and is largely recommended against at this time. If you use very small values to get a more bump map-like effect it works well, but major displacement of imported objects is inconsistent at best. This will be improved in the future.

- Oshyan

[rcallicotte]

Use displacement for your bump maps.

Here's a really dumb question. I was just reading another thread where the poster mentioned applying texture and bump maps to an obj....well how the heck do you control and use bumps....a network screen grab of a ter or obj loaded with just a colour and bump map applied would go a long way in explaining this to dumb ol me...LOL

[bobbystahr]

Many thanks all...clear now....

[Oshyan]

Think I gotcha...know bout the internal network, just haven't explored it much yet....but I understand displacement=bump?...so bump is an irrelavant thought as smart displacement will give the mesh effect whereas bump doesn't distort the mesh, just the way it uses light info.Thanx and if I'm way off base pleeeease correct me...LOL...it'll help with my renders which are a bit confused at the 'mo

Correct, TG2 doesn't currently support "bump mapping", but displacement can generally do anything bump mapping can do and more. The results are usually more realistic because there is actual dimension there. As others have said the displacement support for objects is currently limited in that meshes can break apart if the displacement is too extreme, but you normally won't want large values anyway for realistic results.

- Oshyan

[bobbystahr]

Indeed they will break...but as with sugar, a little is often enough.. ...

[rcallicotte]

For my mech, I use only .05 on the Displacement and it seems to be enough.

[§ardine]

hey thanks calico, I was wondering what settings you used for that.
~§ardine

[Volker Harun]

It occured to me yesterday evening.

Though knowing the issue of placing displacements on imported objects, I gave it a try.

First, I created a nice cube in Cinema4D, exported it, loaded in TGTP and resaved as tgo.
Loaded this tgo and any displacement killed the mesh.

Then ...
... I started to play around. Stirring and shaking the nodes 

Well, as soon as I put into the shader of the mesh the Base-colour-shader, the displacements worked. Even hard displacements.
But only on the upper side of the cube.

This might be, because I deleted the multishader of the mesh, but dunno.
It was time to go to bed then ... but maybe somone wants to give it try or two!?!

Volker Harun 

[Ogre]

Take a look at my Nautilus model.  I used displacement with no real issues.

http://www.ashundar.com/list.php?c=models

[§ardine]

Hey Volker,
Just wondering if you would mind posting an example of what you are talking about here.

[rcallicotte]

http://www.ashundar.com/CPG/displayimage.php?pos=-3629
http://www.ashundar.com/CPG/displayimage.php?pos=-3684

Some examples of a displacement map with default shader.

[§ardine]

http://www.ashundar.com/CPG/displayimage.php?pos=-3629
http://www.ashundar.com/CPG/displayimage.php?pos=-3684

Some examples of a displacement map with default shader.

thanks calico, I guess I should have been a little more specific in my request
here's the quote from Volker that I was curious about:

Well, as soon as I put into the shader of the mesh the Base-colour-shader, the displacements worked. Even hard displacements.

I was wondering Volker, what exactly did you use to get this displacement?
You said you were able to get "hard displacements" This sounds pretty significant!
"Base-color-shader"? I'm either blind or not sure what you're saying...
I would be interested in a bit more of an explanation or a clip of this if you might be so kind

thanks,
-Sardine