 Okay, this video is going to be a simple one just kind of building up because I'm going to be doing a motion tracking video here In the future, and I want to show you how to overlay 3d objects in Blender Onto a video so let me go ahead. I'm working with Blender 2.87 a Going to go ahead and in here. I'm going to hit Walt with my curse over the 3d viewpoint one on their pad to get front view Control alt zero on their pads bring my camera to the front view here If I hit f12 to render at this time, it looks like a black square because the lighting is behind it I'm gonna go ahead and go to the world settings Ambient occlusion Multiply and turn on environment lighting and now we can see our 3d cube here If I could let's delete the 3d cube and get something a little bit better We're gonna go ahead and use our our monkey head here We're gonna smooth that out just to make it look nicer and subsurface it a little bit here So under modifiers, we're gonna subsurface Make it smooth and now I can f12 that out and You know, we'll also give it a texture here. Let our material here. Let's go ahead and make it a pink monkey head There we go. Okay, so now we have this gray background, okay? Which is what our sky is set to and I am using the Blender the internal renderer for this tutorial It's different with cycles So I'm going to go to my renderer view here and I'm gonna go down to Shading and here under alpha you can see sky so alpha will be anything that's not a visible object So anything other than 3d objects, which would be your Background do you want to render the sky or if we click that we can change this to transparent And if you come down here under output, you can see it says PNG and we have RGB a selected That's by default a is the alpha so now if I hit f12 You can see our monkey head here and you can see that we have instead of that gray background We got a checkered background, which is basically saying it's trans it's transparency. Let's go ahead and put our resolution up full There we go. Okay So now I can f3 and save this as a PNG bring it in again and put it over a still image or I can do a still image or video here in Blender using the compositor So what I'm gonna do now is I'm going to go up to default and go to composite I'm gonna choose use nodes and I'm gonna add a backdrop the backdrop will let us see what we're doing Real time in the background of our compositor here if I do shift a here and I go output viewer Put there and then I'm going to click this here if you have not used the compositor It can seem overwhelming at first, but it's not that difficult Remember anytime you're working in Blender the keys are pretty much the same as if you were in the 3d viewer So I'm going to left click here I'm going to actually it's not the same because it's left click rather than like right click But it's g to grab stuff and move them around. So that's what we have going on there. So now Anything in the background here will be what this viewer is seeing But we have to remember at the end to link everything to our compositor because that's what's our that's gonna be rendering So I can shift a and say input and I can choose an image if I want to put an image in the background But a bunch of other stuff here mainly we're gonna be looking at image or I can do a movie clip I can drag that here I can say open and I know someplace where I have a movie clip. So I'm gonna go ahead and choose that movie clip and I'm going to go ahead and do shift a again, and I'm gonna go to Output or no, I'm sorry color alpha over and I'm gonna put it in line here with our viewer Now the reason it went white is because this is a little weird. I've always found this weird about blender Okay, I'm gonna link my image to the top image here and our other image are 3d seen to the bottom image You would think it would be the other way around you would think that your Background would be on the bottom and then the the foreground stuff would be in the top, but it's reversed It's just a little weird. So there we go. We have our monkey head On the background here And so now you know if I was to move it in our camera view here and hit f12 again to render it out The monkey has now moved over there Now you'll notice that in my 3d or in my renderer output here We're not seeing the background and that's because we haven't yet linked it to our final composite Now we have our image there with the monkey something to keep in mind though Both our images are the same size right now The video here is 1080p and our scene is set to 1080p But you'll notice if I by default this will be set to 50% and if I f12 render that out You notice it now crops the video to fix that and I'll talk about this again in a future video We do motion tracking, but if I do shift a and I go down to distort We can scale and we can drop that right in line there We can scale the image to whatever we want, you know, I can do 0.5 0.5 on the x and y and it's lined up right But now if I put this back up to 100% and I hit f12 you'll notice the video doesn't fill the screen So what we want to do is instead of relative we're going to change this to render size Now whatever we set our render to the video output will be Resized to that as well So that's adding an image and of course you can you know set keyframes and have this move all around our video But in a future video coming up very soon. We are going to look at Doing some motion tracking so look forward to that video if you enjoyed this video if you found it useful be sure to Like share subscribe this video. I appreciate that but if you have a little bit of money And you want to support me financially? 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