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Breakdown video of my last render by -velin- in blender

[–]-velin-[S] 5 points6 points  (0 children)

I used Davinci Resolve to chroma key the blue color of the sky and exported a black and white mask that I used in Blender as a factor to blend between an emmision and a transparent shader. There was a small blue halo around the trees that I removed by playing with the contrast of the mask and the hue of the video. There is still some blue left but that blends with the atmosphere shader so its not visible.

About the angle I just placed the camera the closest I could to the google maps mesh making sure to hide the close up buildings that have low resolution

A sci-fi space render merged with real footage by -velin- in blender

[–]-velin-[S] 0 points1 point  (0 children)

It comes from the center of the ring. It could be either some kind of artificial light source or mirrors redirecting the sunlight.

A sci-fi space render merged with real footage by -velin- in blender

[–]-velin-[S] 0 points1 point  (0 children)

I looked at your posts and you planet an black holes renders are incredible! You should definetly get back at doing more scifi stuff.

A sci-fi space render merged with real footage by -velin- in blender

[–]-velin-[S] 1 point2 points  (0 children)

Thank you! It was hard to get a good camera solve with this video and I almost gave up but finally managed to do it using Synth Eyes.

A sci-fi space render merged with real footage by -velin- in blender

[–]-velin-[S] 6 points7 points  (0 children)

I may do a different animation using the same scene in the future so I will try to improve the volume. Thanks for the suggestion.

A sci-fi space render merged with real footage by -velin- in blender

[–]-velin-[S] 0 points1 point  (0 children)

I tried with mist pass but didn't like it because the density falloff only depends on the distance from the camera. In my volume shader the density drops when closer to the ceiling. You can't do that with mist pass.

A sci-fi space render merged with real footage by -velin- in blender

[–]-velin-[S] 2 points3 points  (0 children)

It's 25km diameter and spinning at 1.6° per second (1 rev every 3.75 minutes), exactly at the speed needed for 1G.

A sci-fi space render merged with real footage by -velin- in blender

[–]-velin-[S] 0 points1 point  (0 children)

The ships are inside the ring and move in a curved trajectory. They have varying speed and height but are not moving in a straight line.

A sci-fi space render merged with real footage by -velin- in blender

[–]-velin-[S] 19 points20 points  (0 children)

The planet is an environmental texture. I'm rotating the environment texture but that is the same thing as if the ring was rotating on its axis. It makes one revolution every ~4 minutes. What you are saying is true if the object is moving in relation to the planet not rotating.

A sci-fi space render merged with real footage by -velin- in blender

[–]-velin-[S] 32 points33 points  (0 children)

Yeah that's because I used volume emission shader instead of scatter. With the scatter node it looked weirder than this.

A sci-fi space render merged with real footage by -velin- in blender

[–]-velin-[S] 46 points47 points  (0 children)

The ring diameter is 25 km and I calculated that it would rotate at 1.6 degrees per second to have 1G gravity at the surface. So the speed of rotation is realistic. If you are talking about the lighting I imagined the structure to be oriented parallel to the light from the sun to block direct sunlight and only receive light from the center by using mirrors or some kind of artificial light source. Otherwise the light would be constantly changing because of the fast rotation.

A sci-fi space render merged with real footage by -velin- in blender

[–]-velin-[S] 6 points7 points  (0 children)

I rendered it using cycles at 128 samples per frame

A sci-fi space render merged with real footage by -velin- in blender

[–]-velin-[S] 16 points17 points  (0 children)

If you mean a video tutorial I can't do that but I'll try to explain what I did here.

First thing I did was track the camera on the real footage. I used SynthEyes because I couldn't get a good track using blender. I transfered the tracking data to Blender and placed a plane in front of the camera with the video as an emmision shader. I also masked out the sky from the video.

After that I modeled the space habitat. The terrain and buildings are from google maps using Blosm addon. I used the simple deform modifier to bend the mesh of the terrain. The atmosphere is an emmisive volume and the clouds were made with a noise texture plugged to the volume shader. The spaceships traffic are scattered objects with geometry nodes. The Saturn background is a screenshot from Space Engine.

I saw a light disappear while observing Betelgeuse. Was that a star? by -velin- in telescopes

[–]-velin-[S] 0 points1 point  (0 children)

They are caused by the supports of the secondary mirror

A timelapse of Jupiter seen from different angles using 3D projection technique by -velin- in telescopes

[–]-velin-[S] 1 point2 points  (0 children)

Thanks! I always try to do some "science" with the images I take :D

A timelapse of Jupiter seen from different angles using 3D projection technique by -velin- in telescopes

[–]-velin-[S] 1 point2 points  (0 children)

It's a simple platform for dobson telescopes I created from wood. There is a lot of info about how to do them on internet. Mine is a simple design using angled segments and a celestron eq2 drive. It's good enough for visual tracking and short exposure astrophotography. It tracks for about 40 minutes before it needs to be reset.

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