Okay
Here it is the tutorial on how I texture in Gimp, using some pictures around my house to make the textures. The three textures below are all I will be using to make my color map.
Textures.
1. A picture of a water barrel in my back yard.
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2. A picture of my marble finished basement floor.
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3. the last one is a picture of the handle on my gas grill.
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4. all other added items I will be using are all available in the tools provided by gimp.
With that lets get started.
1. first thing we are going to make is two copies of that UV Map we made in blender. and name them so you remember what each one is call, for tutorials purposes lets name them map 1 and map 2. once you have done that open map 1 with gimp.
2. Now that we have gimp open with MAP 1 we are going to turn that map into a media inclusion map. the way we are going to do that is in the layers panel and create a new layer, then go to the toolbox panel and click on the icon that looks like a paint bucket, by default the color should be black, just hold the paint bucket over your map and click the entire screen should have turned black, then just go over to the layers panel and click on the green arrow at the bottom and bring your media inclusion map to the top and right click on the media inclusion map and select merge down, you have just made a media inclusion map, or the base for your texture template.
3. Now go to the upper left of your screen and click on file then select open as layers... then just find map 2 and you will notice in the layers panel it is the top template, while you have the map 2 selected just drag the opacity over to “0” then click on the other map and change it from normal to overlay. as seen below. now we are ready to start adding textures and detail to our map
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4. Okay, at this point if you have not found some pictures you are going to use, stop here and get your camera out and start snapping some pictures around your house, and if you want to see how well this will turn out do this then come back and don’t cheat and just do a google search!
5. Okay you got your pictures great, so lets continue. what I am going to do is open those 3 pictures I have and open each one by clicking on file then open as layers... until all three textures are in the layers panel, then once we have done that turn off the visibility of each one of the textures you just added, by simply clicking on the EYEBALL icon for each texture and it will disappear. this way we can edit each one individually.
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6. Next what we are going to do is on the media inclusion map we are going to box select all the items that will have out base texture on the magazine only, we will do the bullet separately since it will be gold in color. the way we do this is hold the shift key and drag the mouse over all parts of the model you are working with once you have finished it should look something like this.
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7. next thing I will do is in the toolbar panel select the icon that looks like a magic wand, and hold it over the map and hold the CTRL key and double left click your mouse button, and then it has just outlined your parts of the model, it should look something like this
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8. Okay at this time we are ready to add the base color to our map, the way we are going to do this is simply in the layers panel turn on the visibility of the base color and make sure it is highlighted or you will be selecting the wrong texture, once you have it selected simply go to the edit key in the upper left of the screen and copy the texture, then turn off the visibility of that texture you just copied then select and highlight your map, and simply go to the edit key once again and paste the texture in there, then in the layers panel you will see a new panel is present called floating selection simply right click on that panel and select anchor layer, you just finished your base texture. and it will look something like this.
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9. at this time we are finished with the base color, you can go ahead and delete it from the layers panel, so you have more room to work with, however if you want to add it to something else just leave it there.
10. Okay at this time you can either do one of two things find a picture of a magazine, to help you determine where you want to add details or just make your own design as I am going to do. and what I am going to use is a picture of that water barrel to add some detail to my model. same thing applies select the visibility of the detail picture you are going to use to add to your map, but this time leave both the water barrel picture and your maps visibility on. but make sure you have the water barrel highlighted or you will be adjusting the wrong map. and basically what I am going to do is scale it to where I want it and also move it, just use the move and scale tool in the toolbar to make these adjustments and once you have got it to where you want it, it should simply look like this. however we want this new detail to blend into our base texture simply slide the opacity over to the left until it has blended to your liking. then once it is to your liking copy it, then turn off the visibility of that detailed item and click on your map and paste it, then just copy it and paste it for the other side of the magazine as well and this is what you get. as you should be able to notice the detail of the barrel is now on my map.
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11. Okay this next part will take some practice, we want to give the illusion of shadows in a 3 dimensional view, and simply this is a matter of light and dark colors placed in strategic locations throughout the model to give that illusion of raised and lowered items in 3d.
12. here is an example of what I am talking about you will see below one map that is correct and the other is in correct when attempting to achieve an illusion.
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13.Okay with that explanation you should have a better idea, just keep in mind to do this you will need to go to the toolbox and select the paint brush icon and just play around with the possible choices from icons, opacity, scale and color as seen below.
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14. I will be using some of these techniques on my project and you should see somewhat of an illusion in certain areas that give an illusion of depth.
15. from the below screenshot you should see some of the shading I added to the magazine using the above technique, like I said it takes practice but once you get it to where you want it gets better through time, just remember practice makes perfect. and I am not a pro at it but I get better each time.
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16.next thing you may want to give it a dirty look or darker look or ad a new color to it, you can do that by going to the toolbox and click on your paintbrush and click on the black dot and pic one of the dirt looks they have available. I am using the one seen below to give it not only a dirty look but darker look as well. you can see it is much dirtier and darker after I added these textures.
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17.lets say we want to add a text on our magazine, use what ever you want. simply go to the toolbox click on the big A then a menu appears you can change the color, font, and size here. then click on the area of your texture you want to add the texture and you can drag it to where you want it and scale it out and have the writing go to the left or the right your choice.
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18.Okay, that completes the magazine, now its time for the bullet we will use the same technique for the shading but the other parts will be a little different.
19. Okay, we have a little problem our texture for the bullet is silver but we know that a bullet is yellow or gold-ish in color, so we need to change the color of our texture and what we are first going to do is turn on the visibility of the item we are using for our bullet and then turn off all the other items in our layers panel, this is what you should see.
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20. at this time click on colors at the top of the screen and select colorize, then simply change the HUE only to about 35. then you should have something like this.
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21. at this time we are ready to add this texture to our bullet. simply that item we just turned gold we are going to box select that item and cut it from the original piece we turned gold then make a new layer and paste it in there, then delete the old texture. once we have done that we are going to select our gold texture and leave our texture open and move it in line with our bullet, you should see something like this. and basically copy and paste as needed of course it will not look like your bullet 100% but it gets the texture in there. then you can start adding detail to it. and if you need to see how the outline of your texture looks like just go to the top template we added and turn the opacity up a little if you want to add a color to the tip of the bullet, and the same process applies in adding shading, dirt look and darker as previously discussed.
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22. and all you need to do is delete all the added texture templates and you should only have your UV Map and media inclusion map just merge them together and thats it. also make sure you turn your opacity back up before merging. or you will see the lines in your texture.
23. and this is what it looks like on the weapon in blender. I have turned off all shaders so you can see the full details of the texture map and you can see the illusion the shading I showed you on the areas I made scratches the screw and depth areas. its still flat but it appears 3d. I hope this was educational and helpful. and of course you can increase the illusion when making the normal map and spec map.
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I TRIED TO MAKE THIS AS SHORT AS POSSIBLE PUT NOT BY LEAVING A LOT OF EXPLANATION OUT, SO IF THERE IS ANY PART OF THIS TUTORIAL YOU DID NOT UNDERSTAND PLEASE LET ME KNOW, AND I WILL ANSWER YOUR QUESTION HERE ON THIS THREAD, BUT ALL IN ALL I HOPE THIS WAS HELPFUL AND EDUCATIONAL, HOWEVER THIS IS ONLY ONE WAY OF TEXTURING IN GIMP, THERE ARE MANY OTHERS BUT I PREFER THIS ONE, I JUST WANTED TO SHOW YOU HOW COMMON HOUSEHOLD GOODS CAN MAKE A GOOD COLOR MAP FOR YOUR OBJECT YOU ARE MAKING. PLEASE COMMENT ON MY TUTORIAL IF YOU LIKED IT OR NOT OR ANY RECOMMENDATIONS, I JUST WANT TO HELP THE FREE LANCE ARTIST OUT THERE THAT MAY OR MAY NOT WANT TO MAKE A GO AT THIS.
AND JUST REMEMBER THE ONLY STUPID QUESTION IS A QUESTION NOT ASKED, I WILL NOT JUDGE YOU FOR YOUR QUESTION I WILL JUST ATTEMPT TO ANSWER IT.
CHEERS!