Create a Spectacular 3D Space Explosion

Concept

There are many different ways of creating space scenes and I’ll show you how do I usually do it. First of all, we should imagine how should the final image look like. In other words what we are going to create? My scene isn’t going to show anything special. There will be only some planets and a galaxy visible from top view in the background but obviously you can think of something different.

Creating Space Background

First let’s create a 1920×1200px Photoshop document and fill it with black with Paint Bucket Tool (G).

Background

Now let’s create another layer. Use your Brush Tool (B) with color set to dark blue (#172a3a in my case) and radius set to something between 300 and 1000 pixels to colorize your background. Use lighter blue (such as #162a3f or #27475f) to create some lighter areas at the bottom corners. When you are done I suggest to go to Filter -> Blur -> Gaussian Blur… and blur your layer a bit to make it look softer. For the radius type in 60px and it should be enough. At this point our background doesn’t look very interesting. We need to add some depth to it so I suggest to download any clouds image (I took stormy one from http://www.cgtextures.com/ website), paste it, set it to Overlay and decrease its opacity to 15%. If you don’t get anything similar to my background you can play with brightness and contrast (Image > Adjustments…) of your layer. Here’s what I got:

Setting Up Star Brush

It’s time to add some stars. Set your Brush Tool (B) to white color and use the following settings to create a new brush:

Painting Stars

Paint some stars on a different layers. Set them to Overlay and duplicate a few times by pressing Ctrl + J. You may also use a standard star brushes that comes with Photoshop or create some bigger ones somewhere. It’s a good idea to group each level of your stars as I did.

More Depth

Our background is already good for placing anything on it but I decided to add even more depth to it by placing dark galaxy at the center of my image and by darkening image corners a lot. You can download high resolution galaxy brushes made by thepixlpusher here: http://www.box.net/shared/hfqbplyosg. Choose one of the galaxies that is visible from top and paint it at the center of the image using black color. If necessary you can duplicate your layer to make the effect stronger. I’ve also created four more layers and placed there edges of the same galaxy to make corners of the image darker and more diversified. As for now we have a nice background to start with. It’s time for planets and other effects.

Planets

To create planets we can use any 3D application but I suggest to do it with Vue Infinite or Vue xStream. I’ve used Vue Infinite to do all the work because it has variety of presets that you can use and modify really quickly. The same effects can be achieved in 3ds Max or any other 3D application but Vue is created for rendering environments so it’s just a way easier. So, create a sphere and place it in front of your camera. Select both the camera and the sphere and in Side View grab the Z axis to move them up. After that rotate them counter clock wise until the camera doesn’t catch the ground.

Setting Up Atmosphere

Go Atmosphere -> Load Atmosphere… and choose Godrays that I found are great for this purpose. Select the last preset and find Atmosphere Editor under Atmosphere menu group and change the Lighting Model to Global radiosity which will make your renders a way better (well, not always better and that’s depending on your atmosphere – some of them are not conformed to be used with Global Radiosity – but it’s usually good to choose better lighting model anyway (at least I tend to choose GR often)).

Moving Sun

Afterwards move the sun a bit towards camera and back in the viewport because we want it to shine from the side of your render and not from behind the sphere.

Planet Materials

Click on the sphere and choose Get Material option from the menu to the right side of Vue Infinite. You can really choose anything from there or modify existing presets as you wish but I’ve first chosen clay material and then Chipped with Paths and both seem to work fine.

Render your scene with the setting shown below.

Rendering Planets

Here are my examples of planets:

Saving Renders

Save each render with its alpha map because we’ll want to cut it out of the background later.

Cutting These Things Out

Back to the Photoshop again. Open up one of your renders and paste its alpha map on a separate layer. Select white part of your alpha map with Magic Wand Tool (W) as shown below. After that select your planet layer and press Ctrl+J. This should cut your planet out of the render. Do the same with the other renders. Afterwards copy your planets and paste them into your main Photoshop document.

Asteroids

Your can create asteroids exactly the same way like you did with the planets but this time you should use rocks (you’ll find them in the left Vue’s sidebar) instead of spheres and obviously you should create some more of them. Place them as you wish. Below is my example. If you already render them follow previous steps to cut them and paste into main document.

Composition

Once you have all the necessary elements you can create a scene. I decided to simply place shiny star right next to the center of the galaxy and two planets on the opposite sides of the canvas. Maybe it’s not very imaginative but it was created for tutorial purposes only.
Things to keep in mind:

• You should rotate pasted images if the light goes in the wrong direction.
• It’s hard to blend those renders with your background perfectly and probably the best way to do that is to adjust each of RGB channels separately and change the overall color to make it look that it belongs to this image but I decided to adjust background instead of planet colors. I made it darker there where it should blend with asteroids and planets. Also I’ve darkened some parts of planets to match the image.

Main Star

To create big star at the center simply create a new layer. Fill it with black color and go to Filter -> Render -> Lens Flare… Use 100% for Brightness, 105mm Prime. Hit Ctrl/CMD+T to scale down your newly created star. You can also erase edges of your rendered image with soft eraser to make it blend better. Set layer’s blend mode to Color Dodge and duplicate it if necessary to make effect stronger. Rays coming from the center were made by using brush created in the second step of this tutorial. Frist draw some dots. Make sure your dots are at the center of the image. Use radial blur by going to Filters -> Blur -> Radial Blur… with the Amount set to 25, Blur Method set to Zoom, Quality set to Best.

Placing planets and asteroids

Paste all the planets and asteroids into the main document. I’ve simply rotated the first planet and placed it in the top right corner. I’ve also resized the moon-like planet and placed it next to the first one. In the other side I’ve placed the second planet and some debris near it.

Adjustments

If the planets don’t match the background you have to play with their brightness, contrast and color. I’ve selected everything that doesn’t match and made it darker using soft brush (paint on the new layer). Once you’ve painted some dark areas you will probably have to set your newly created layer(s) to Overlay, Soft Light or Color Dodge blend mode. You may also decrease layer’s opacity or duplicate the layer to make effect stronger. The area below was corrected by just placing black layer above asteroids layer with blend mode set to Overlay.

Space Explosion

The last thing is to add some fire and destroy a little part of one of the planets. First let’s make a selection using Lasso Tool (L) selecting the part of your planet that you want to get rid of. I suggest to make it a little bit jaggy. After that select a part of the area where you want to create your fire and go to Image -> Adjustments -> Variations…. You can play there with your fire as you like but I think you’ll only have to press “more red”, “more yellow” and “darker” a few times to make it look realistic. Select different parts of you planet and make it hotter. Once you are done you can use Smudge Tool, Dodge Tool, Burn Tool, Spoonge Tool or Sharpen Tool to adjust some parts of your explosion.

The hottest part of my planet is actually a third planet scaled down, with decreased size and variations applied. Just place it near the main planet and use your smudge tool to blend it if necessary although I didn’t do that because it seemed to be fine anyway. You may also want to duplicate this little asteroid and use motion blur on a duplicated layer. Make sure you’ve placed blurred layer below the main layer.

Conclusion

For the final image I’ve moved some elements in the better place and I’ve ended up with something like picture below. I hope you liked it and I hope this was useful for you. If so you can check my other tutorials or subscribe to an rss feed for more.