I wanted to show the complexity and immenseness of the gas structures in Orion with this image...The Orion complex is one of the most active regions of nearby stellar formation visible in the night sky, and is home to both protoplanetary discs and very young stars. Much of it is bright in infrared wavelengths due to the heat-intensive processes involved in stellar formation, though the complex contains dark nebulae, emission nebulae, reflection nebulae and HII regions which are vast areas of interstellar atomic hydrogen that is ionized.
The presence of ripples on the surface of Orion's molecular clouds was discovered in 2010. The ripples are a result of the expansion of the nebulae gas over pre-existing molecular gas. Several nebulae can be observed visually through binoculars and small telescopes, and some parts (such as the M42, the Orion Nebula) are visible to the naked eye. M42 and M43, in the bottom left corner of this image are sometimes referred to as 'Orion's Sword'...

The 3 stars in the image are (Left to Right) Alnitak, Alnilam and Mintaka...

Alnitak (ζ Orionis) is estimated as being up to 28 times as massive as the Sun, and to have a diameter 20 times greater, it is 1,260 light years away from Earth.
Alnilam (ε Orionis) is a supergiant star, approximately 2,000 light-years away from Earth and magnitude 1.70. It is the 29th-brightest star in the sky and the fourth-brightest in Orion. It is 375,000 times more luminous than the Sun.
Mintaka (δ Orionis) is 1,200 light-years away and shines with magnitude 2.21. Mintaka is 90,000 times more luminous than the Sun. Mintaka is a binary star. The two stars orbit around each other every 5.73 days.

Putting the image together...

To process this image I removed the stars from the Ha image and then did multiple layers of careful HDR in Pixinsight to produce several images with differing levels of detail. I then blended sections of these multiple images using layers in Photoshop to produce a single detailed image. I then put the stars back and star aligned a different desaturated Ha RGB image of the Orion Nebula (taken last winter). Having removed the stars again I then blended, the now monochrome, registered and starless, Ha RGB image into the processed Ha image in Photoshop. I did this specifically to add tighter detail and bring out structures such as M43, the 'Running Man Nebula', otherwise not fully visible in my Ha only widefield data.
Having completely processed the starless image I was pleased with the result but decided to put the stars forming the asterism that we know as 'Orion's Belt' back.
I think that having these massive stars in the image helps to imagine the huge interstellar forces that are creating the nebulae and dark dust structures.
The main 3 stars were layered in by carefully matching the levels of the completed starless and original image in Pixinsight then again blending in Photoshop. 

This type of image is a departure from my normal processing but it was an interesting exercise with a steep learning curve!

Hopefully this image conveys the majesty and scale of, what is in reality,  a small part of the universe.

Clear Skies
Olly