I am trying to add my own picture so I can have them as artwork on the walls of my game. can anyone help me with this? or is this impossible to do?
thank you for any help

if you mean like a decal the only way afaik is to import a quad with the image as it's texture

As small g says.
I could do a basic quad and assign a texture to it so you can then paste your art onto it how you design fhe art framework is up to you.
But
You can just probably use an already in the package item, just change the picture part within the texture.
Note
anything altered must not be sold as its copyrighted to an artist altrady who assigned the texture to their object. So you can retexture but only able to use within the software and be protected. But also they may have their own terms and conditions. Which may not allow you to alter textures.

I also suggest that you learn about texturing and how it works there are many tutorials and information on how to on here and on YouTube check out monkeyfrog amd also check out gralhix and his helpful 3rd party apps.

Hope this helps

@ Shadow_Master
Ignore your 3d modeling skills, but that's most likely the simplest thing you can do, i.e with Blender; ignore how it works since I use a different 3d soft, but it is just a matter of modeling a simple frame plus a plane for the picture itself; add wood texture to the frame and your picture to the plane.
You can use this one as a template, so, just change the textures, and you'll have a different one.

In GGMax just go to your scene and place the pictures wherever you want to, make them "IsImmobile = yes" in your mesh settings panel.

Thank you all so much. @3com guess I got to learn blender and how to add texture to my items

@ Shadow_Master
I am going to reply to your message here, since this is recorded in the forum, and it can help other users with the same or similar problem as you.
A very good free program to create PBR textures is Materialize.
https://boundingboxsoftware.com/materialize/

This is a good set of video tutos about Blender:
https://forum.game-guru.com/thread/208184

Interesting tutos that might help you a lot:
https://forum.game-guru.com/thread/223410#msg2648097

Ok well if you want a quad with a texture assigned let me know

@3com thank you so much

@ Shadow_Master
You are welcome

Well after a couple of hours of trying to get the texture (my picture) to line up correctly in a picture frame, I deleted the frame, and the back but keep the canvas and the results are below lol

The first screenshot is in-game and the second one is in the editor. I actually like it without the frame but I will keep trying to figure out the frame part.

btw the picture (on the brick wall) in the screenshots is 100 percent mine

@ Shadow_Master
How it should be (easiest way for you)
1- The frame should be a mesh and the canvas as well, so, you will have 2 separate meshes (frame and canvas)
2- The frame can be textured with a wood material
3- The canvas with your picture
4- Once done, export the mesh as 1 mesh (multi-object and multi-textured)
4a- multi-object because it is composed of two meshes (the frame and the canvas)
4b- Multi-textured because it is using more than 1 texture, in this case, 2 textures (the wood and your picture textures)

Note: You are going to texture your canvas with your texture, and this is fine to start with, but take into account, that a canvas does not have the picture on both sides, which could imply using 2 textures in the same mesh (the canvas), but this is another different story

@3com thank you for all that great information

@ Shadow_Master
Glad to help

I uploaded an entity for you if you want to use it. All you need to do is place your image in the area that says "Your Image Here"
https://drive.google.com/file/d/1L6xlSX1ANZmX_QoPr5JPdw_ZausJMSJ1/view?usp=sharing

I'm working on some haunted houses and using some pictures here, although, they are horror genres.

https://youtu.be/qlMFAQceiYU

@thatandplaygames thank you so much