Bump don't change

[Moataz]

Hi guys, first time here , as i have a big problem,
when i add bump texture the amount of bump parameter don't make big difference when i make it to high.. as i want the logo to be very big engraving in the model. like when the bump is 5.. i want to make it like 50 but no different
hope someone help

[DMerz III]

Bumps do not 'move' geometry, it is more of an optical trick to affect the 'appearance' of light. So at some point, the effect doesn't work. 5 is pretty high for bump mapping, so that's probably beyond the max.

If you want embossing, you want to displace the geometry. Keyshot does not currently handle displacement mapping, but loads of other modeling programs do. You can bake the displacement map there, and export that into Keyshot for rendering.

For more explanation on the difference, see this CGCooking article.
https://cgcookie.com/articles/normal-vs-displacement-mapping-why-games-use-normals

Good luck,

David Merz III

[Moataz]

Thanks a lot man

[ieatfish]

Blurring your bump map slightly may also get you a better result. Currently it is a perfectly sharp edge but a slight blur will make the height change a bit more apparent.

[Moataz]

i did that.. but i need a very high displace. i have to make it in Zbrush :\