bump mapping in difusse material

[cjd2]

From another post in spanish language:
(Sorry my poor english , it is a Google Translation )
Sorry for the insistence, but I am somewhat desperate .
My client is calling me more realistic about the bricks of the project, specifically the bump.
The question is:
I can or I can not get a good bump with Octane? .
Because I feel like the thing in this area is undeveloped, poorly developed I'd say.
Please, if you can not, if there is no way, I request you inform me, I will change the rendering engine to Yafaray until there is a version of Octane enabling efficient control of the bump in a difusse material .
It is well known in the world of digital imaging, use the bump to avoid having to model hundreds of polygons is a widely used strategy, Octane would be good if you do not, take account of this development is only a opinion, but about 12 years ago that I am at this and think a program of payment (even a beta version) should have control over this, especially if you have free programs.
Thanks again for the time spent in responding .
Regards
Cjd2

[radiance]

Hi,

I don't understand your issue.

We support bump mapping on diffuse materials fine.
If it does'nt work, you're probably doing something wrong...

Radiance

[Scog]

Bump does work fine on diffuse as Radiance says, though I can understand if you want a more convincing effect.
Until displacement mapping is supported some people have suggested baking the displacement to polygons in your host app.
This can take a bit more memory though, so it may not always be useful.
Here is a quick test I did for a bump map on a diffuse material.
To get the best results you will need to experiment with the brightness and contrast of your bump map, the right settings can make a big difference.
Another tip is to use a glossy material with low specular and high roughness instead of diffuse, the extra highlights help to add depth to the bump.

[n1k]

I would also suggest baking displacement for bricks if you can fit it in your video RAM. Here's my test on that subject.

Cheers,
n1k

[cjd2]

Radiance:
Please, if I'm doing something wrong, I can teach it?
Only do this, take a 2x2 meter cube in Blender and performed in Octane bump effect on a diffuse material until it appears in the following image with nothing more than that.
This example is more than enough, then tell me you made the magic com if?.
Scog , n1k , thank you for your help.



Uploaded with ImageShack.us


The texture:


Uploaded with ImageShack.us

[GeorgoSK]

C'mon, he prolly doesn't have time for this...

Bump works, I am able to achieve results I want with it, I could post many proofs.
If you imported scene in correct scale, then maybe try switching "inverse" on bump map. Or try playing with contrast settings of bump map in Photoshop and then try importing again.

[GeorgoSK]

I would also suggest baking displacement for bricks if you can fit it in your video RAM. Here's my test on that subject.

Cheers,
n1k

I like this how much polys did it generate... ?

[Rhodesy]

that brick tex has pretty much no contrast in it which bump relies on, make it black and white and increase the contrast in PS. But looking at it you might have to mask the grout and darken that manually as the image it that flat. Also remember that there shouldnt be too much bump on brick a lot can be done with specular mapping too as the eye picks up the sheen of the brick and the diffuse of the grout which helps the contrast in these situaltions. Too much of a grout setback makes it look like it needs repointing!

[cjd2]

Ok, GeorgoSK, if you say you know how to do it , do not you can take more than a minute . I need to do an image with an intensity bump as I showed.
If it's so simple and easy to achieve, as you say, and since we do not have time Radiance, then I ask a favor make the effort to show me how .
Thank Rhodesy .
I hope the sample GeorgoSK thanks .
Bye.
Cjd2

[GeorgoSK]

Ok, GeorgoSK, if you say you know how to do it , do not you can take more than a minute . I need to do an image with an intensity bump as I showed.
If it's so simple and easy to achieve, as you say, and since we do not have time Radiance, then I ask a favor make the effort to show me how .
Thank Rhodesy .
I hope the sample GeorgoSK thanks .
Bye.
Cjd2

But did you try the suggestions first... ? Rhodesy said the same. Just do that for now

If won't work, I'll make you a sample by myself, no worry.