Bump Mapping Brick Wall

[trumpet]

I'm using w11 with gimp 3.04. While I'm creating still images with gimp, the images will ultimately be used in video.

Perhaps you've seen a brick wall at a library or train station that features images in relief constructed onto the wall, such as shown in the attached photo. That is the effect I'm trying to achieve. I have an .jpg/.bmp of the side of the building (called "wall) I'm trying to modify with several b&w images to be bumpmapped (called "bumpedimage") into/onto its side. The bumpedimages are .png.[img]E://Alliance-Files-Kenny Lincoln\WallDisplay\walldisplay6.jpg[/img]

1. To get the placement and size of the b&w bumpedimages correct, I have first made the wall and bumpedimgages the same size (pixelwize) with the bumpedimages occupying an area that is largely transparent. The bumpedimage is proportionally correct and placed in a predetermined x/y location. This placement is shown in the following attachment with the b&w layer on top. In the final application, which is video, the entire scene is zoomed into so that the bumpedimages coming out of the brick wall are more easily seen.

Please note that in this screencapture, the placement of the layers is incorrect as the bumpedimage layer is to be placed under the background image.

2. Even when I place the bumpedimage layer under the background layer and add the bump map filter to the background image (as shown in the attached file, I cannot get the desired effect no matter how extremely I vary the controls such as depth/elevation etc. [img]c://Users\Admin\Pictures\Screenshots\wallgimp-2.png[/img]

3. In the video, the background wall remains constant and does not move while different b&w images fade in and out (bump in and out) of the wall representing different historical figures attached to that location. Bumpedimages are of different sizes and located at different positions along the wall.

Any suggestions to make this effect work would be appreciated. Should the b&w images themselves be individually bumpmapped first, just to emphasize their contrast in shading or luminance?

[Ofnuts]

Your links don't work, the URLs are local disk URLs (c://Users\Admin\Pictures\Screenshots\wallgimp-2.png). See "Attachments" link at top right to attach images. You can attach the screenshots as JPG to keep them under 500K if necessary.

[trumpet]

(Today, 01:06 AM)Ofnuts Wrote: Your links don't work, the URLs are local disk URLs (c://Users\Admin\Pictures\Screenshots\wallgimp-2.png). See "Attachments" link at top right to attach images. You can attach the screenshots as JPG to keep them under 500K if necessary.

Do I understand that images for the posts have to be first placed on the internet on some website and cannot be uploaded from one's computer? I have my own domain and could upload the images to a separate page on that website and therebye provide a full URL, but that requirement seems illogical. I see the "insert an image" icon which brings up a quest for the URL, to which I provided a local disk location as you noted but that didn't work.

I also see your Attachments prompt at the bottom of this form and I have attached (inserted the local file name from my computer) for all four pics for this post, but they never appear inserted into the text or accompanying the text when I try to preview the post.

There's something here I'm missing.

[Ofnuts]

(Today, 03:36 AM)trumpet Wrote:

(Today, 01:06 AM)Ofnuts Wrote: Your links don't work, the URLs are local disk URLs (c://Users\Admin\Pictures\Screenshots\wallgimp-2.png). See "Attachments" link at top right to attach images. You can attach the screenshots as JPG to keep them under 500K if necessary.

Do I understand that images for the posts have to be first placed on the internet on some website and cannot be uploaded from one's computer? I have my own domain and could upload the images to a separate page on that website and therebye provide a full URL, but that requirement seems illogical. I see the "insert an image" icon which brings up a quest for the URL, to which I provided a local disk location as you noted but that didn't work.

I also see your Attachments prompt at the bottom of this form and I have attached (inserted the local file name from my computer) for all four pics for this post, but they never appear inserted into the text or accompanying the text when I try to preview the post.

There's something here I'm missing.

No, please read this (which is the Attachments link at the top right of this page). You don't need to put your picture on another site but you have to upload them here (which mean somehow hitting the Browse... button at some point).

[rich2005]

@trumpet

I did see your post and images on pixls.us
Normally bump mapping is very straight forward, Desaturate the subject. Apply a small blur. Use that as a map on the background.

Might not be as easy to get the required effect.  I can get this, reasonably easily.  A comment about the subject matter, Mine is too "fussy" and your figure might be the same. Think of a 1930's poster, simple figures strong colours. 

   

..in a two minute video:  https://filedn.com/lkb9dw6mEfXSsOu9uKLaM14/wall.mp4

[trumpet]

Thank you for your response Rich 2005. I see that you did not convert your "couple image" to a gray scale or a black and white image, which I though was a requirement. My source for the images to be placed on the wall are already black and white photographs because they come from a time when that was the only option.

I think my biggest problem will be to make the "couple image" pop out from the brick wall, i.e. look like it is extruding from the wall. There is some of that in you demo, but I'm not sure it is enough.

My next question is how to take the motar gray color and use it to outline and provide the "bumps" rather than the black outline color.

I'll also have to figure out why my bump map filter setup (shown in the pixls.us post) won't produce any results. I'll keep trying.

Thanks again.