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enter image description hereI'm using a black and white bump map image to carve a image from an object but when I change the height it only bumps a little. If increase the height nothing really changes. How can I change the height/depth of my bump map?

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    $\begingroup$ add a math->Multiply node so that you can scale the values. $\endgroup$ – cegaton Feb 19 at 19:23
  • $\begingroup$ @cegaton still nothing really happens the height always stays the same whatever value it gets $\endgroup$ – CrisC Feb 19 at 20:43
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    $\begingroup$ Please use the edit link at the bottom of your question (i.stack.imgur.com/lXFuK.png) and add images that might help us understand your scene and settings. ( to learn how to post images read this link:) $\endgroup$ – cegaton Feb 19 at 20:58
  • $\begingroup$ @cegaton I've added my node setup $\endgroup$ – CrisC Feb 20 at 13:56
  • $\begingroup$ If you have a full black and full white image, there is no height-- the only thing that matters in a bump map is the change in value, which in your pic, exists along only a single pixel border. You really can't get away with using a 1-bit color image as a bump map-- there's very little point to it. If you want your bump map to look better, pop it in GIMP and run a gaussian blur on it first. After that, changes in height will become more apparent. $\endgroup$ – Nathan Feb 26 at 6:24
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Bump Map is very subtle, if you need more depth, try with displacement.

enter image description here

Good Luck

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At first of course, use an app like CrazyBump or else to convert your picture to a DISP picture.

Then: Image Texture node (Non-Color Data mode) -> (Color Output) -> Height input of a Bump node -> Normal input of a Diffuse node -> Material Output node. Play with the Strength value of the Bump node to increase the effect.

As Cegaton said, if necessary, you can increase the effect with a Converter > Math node (Multiply mode) between the Image Texture and the Bump (you could also try a Converter > ColorRamp node between the Bump and the Diffuse).

enter image description here

Here I've used your file, set a simpler material, and played a bit with the different values of CrazyBump, it gives a bit of blur and grey, you can get something better than what you can get with a simple B&W picture, but you can't simulate a deep engraving, especially if you don't have any image texture that goes along and that could help to fake it...

enter image description here

BlenderForNoobs has made a video on this topic, you can see that you can only fake a slight engraving: https://www.youtube.com/watch?v=wWB5XVK7-VI&

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    $\begingroup$ I have the same setup but nothing changes (added image of my setup in my first post). The image I'm using is kind of a stencil. $\endgroup$ – CrisC Feb 20 at 13:49
  • $\begingroup$ we lack information, for example, what your map looks like? Even with a black & white picture I can get a correct result, as long as I convert it to a DISP picture of course. Perhaps share your file, and don't forget to pack the image as PNG: blend-exchange.giantcowfilms.com $\endgroup$ – moonboots Feb 20 at 14:21
  • $\begingroup$ The background is totally black (#fff) with totally white(#000) stars on it.The image has 8k size and has the PNG format. $\endgroup$ – CrisC Feb 20 at 14:50
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    $\begingroup$ again, you need to convert it to a DISP picture with an app like CrazyBump, or with a online converter, have you done it? $\endgroup$ – moonboots Feb 20 at 14:53
  • $\begingroup$ The image I'm using is already a black and white image. Using Crazybump to convert a b/w image to an DISP image doesn't give great results. $\endgroup$ – CrisC Feb 21 at 17:07

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