KeyShot Forum

Archive => Support Archive => Topic started by: Moataz on February 19, 2018, 01:51:14 AM

Title: Bump don't change
Post by: Moataz on February 19, 2018, 01:51:14 AM
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 :)
Title: Re: Bump don't change
Post by: DMerz III on February 19, 2018, 11:46:08 AM
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
Title: Re: Bump don't change
Post by: Moataz on February 20, 2018, 06:12:38 AM
Thanks a lot man :)
Title: Re: Bump don't change
Post by: ieatfish on February 20, 2018, 06:56:55 AM
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.
Title: Re: Bump don't change
Post by: Moataz on February 20, 2018, 06:59:15 AM
i did that.. but i need a very high displace. i have to make it in Zbrush :\