Remained the final touch is to add the flying missiles and explosions. Place image (File > Place) “shooting_by_mariasemelevich-d826nte”. Set Blending Mode “Screen”, resize it on working area and place this image that smoke corresponded to smoke on main image (it was the basis and continuation) and to skyline. Try to keep the explosions do not touch the ground much, but a little, picture was applied to the distant mountains.
As can be seen from the previous image, I have united the whole landscape into one group (Cmd/Ctrl + G). Working with landscape over and you can start to add aliens. In this part of tutorial, I added an aliens and effects for them. Open image (Cmd/Ctrl + O) “aliens_png_by_mariasemelevich-d826naw”. In this step everything easy, select Lasso Tool (L), select the first group of aliens (where they 4 subjects and doesn’t necessarily add to selection another piece of aliens:)). Hold Cmd/Ctrl (switch on Move Tool (V)) and move it into working document.
In working document resize them (Cmd/Ctrl + T) and put it in the right place. I placed them on the right side of the image, so that they went out from the ruined buildings. Do the same with the rest of aliens, but do not touch the flying ships yet, I added them later. Be sure to place aliens layers over a group with a landscape.
Try to stick to the proportions as the size of the aliens, so they were not too big and stand out from the landscape. Just try to choose for them interesting and appropriate landscape (if you look at the movement of the first aliens, you will see that they are standing on a rock, which is absurd, but I will fix it, using smoke). If you have a situation arises, try to disguise this place, using objects or other aliens. To little hide the legs a alien, I added a layer mask and removed part of the legs on the rock (for aliens from the previous image).
When I am located all the aliens in the right places, I went to work with shadows. It’s a bit tedious process, but believe me, it is very useful. Thus, hold Cmd/Ctrl and click on aliens layer thumbnail, create a new layer and fill selection black color (press D then X and use Cmd/Ctrl + Del or Edit > Fill…).
Use Free Transform tool (Ctrl/Cmd+ T) to Flip Vertical and connect shadow with alien’s legs. Select Distort Tool in transform mode and move the shadow a little closer to the alien (for pulling the mid-point of the upper horizontal frame) so that it was shorter and tilt it to match the light source (basically move the shadow slightly to the right). Change Opacity to 35%. And so it must be repeated for every alien. I understand that it is a bit tedious, but for a realistic picture of the shadows are very important.
If you are satisfied with the position of shadows then combine them in a single layer (Cmd/Ctrl + E or right click on selected layers, from the drop-down list, select “Merge Layers”). Add filter Gaussian Blur (Filter > Blur > Gaussian Blur), set Radius: 15.0px. Shadows are ready! Also merge layers with aliens (Cmd/Ctrl + E) to make it convenient to work with it.
Stay flying ships of aliens. As in the previous steps select all and move flying aliens in the working document. Place them just above the missiles. Add a layer mask and use Brush tool (B) with very small Opacity: 15-30% (Size: 150px, Hardness: 0%), remove some parts to create visibility of the flight in the clouds. Try to remove the part of the ship on which the sun shines and the tentacles, because they are thin and not likely to look much clearer.