Bump and displacement problems

It’s my understanding that you need a grey scale image of the texture you are trying to bump or displace. Is it possible to do this without photoshop? I have no way of getting grey scale images. Is there another way?

Re: Bump and displacement problems

there are other free software that can do this.
Gimp is one open source software i could think that work like photoshop.

Re: Bump and displacement problems

Great! Thank you. ;D