A rocket hovering above the water close to the shore. The water is transparent in shallow parts and gets progressively darker and more opaque the deeper it is.
With the added transparency and light absorption, the water shader now passes the "do I want to go for a swim there" test :)
Next, I finally need to address the texture tiling.
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This would have been trivial with the depth prepass. This way however I can use the depth from the main opaque pass and avoid rendering the terrain twice as its vertex shader is not quite trivial.
A scene with the ocean in the background. The ocean is just a black and white representation of the depth texture and shows the terrain underneath the water.
Managed to get the depth texture into the ocean shader. This felt super hacky with the higher-level material system but should allow for some nice transparency effects.
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A moon with a barren surface containing a network of canyons with glowing lava. In the background is a gas giant with a ring.
I added the option to output an emissive texture from the terrain generator. Here's a new moon to showcase the effect 🌋
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The clouds are currently just added on top of the atmosphere. This looks fine when the camera is close to the clouds but something is clearly off when looking at them from far away. Something to figure out another day.
The clouds are rendered to two intermediate half-resolution textures, one for the first cloud volume intersection and one for a second one. A third texture saves the distance of the cloud volume from the camera.
The atmosphere shader then blends these textures to render the sky.
Clouds at sunset seen from space.
Clouds from just below the cloud layer.
A happy little cloud from above. It casts a shadow on the ground below.
Many improvements later, here are some more impressions from the new volumetric cloud renderer.
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Volumetric clouds, literally over the horizon of a planet. They have a warm tint as the sun is setting behind them. They currently lack high frequency detail.
First look at the volumetric clouds! I pushed this out for quite some time but am happy to see that they are finally on the horizon.
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Something is wrong with the floating world origin. So may I present:
biblically accurate spaceship
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This of course required a lot of modifications to the original code to support planetary rings among other things. I don't think Bevy's atmosphere rendering needs that, but I'll try to upstream some of the more general changes.
As this new system supports an arbitrary number of atmospheres on screen, I can do away with the LOD atmosphere system. Another source of complexity gone :)
I've been hard at work replacing the atmosphere renderer with a new one based Bevy's atmosphere implementation. It does not only look better, but is also quite a bit more performant!
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sorry I haven't been posting I'm sure you will understand
It currently has a bit of gravity, mainly so that my orbital physics code does not break down.
Rendezvous is slightly different because it requires matching velocity with the ground, which in most cases means speeding up instead of slowing down.
The spaceship in the foreground touched down on the ring world. In the distance, the surface curves to the top of the image.
And here we are! The ring world is now fully integrated in the game. There are still a bunch of rough edges to take care of but it already feels great to sit on the surface and watch the stars slowly rotate behind it.
Thanks! It completely relies on the centrifugal force. Luckily I already have those implemented as they are also important with spherical planets. I'm curious about the emergent flight dynamics as well and it will likely take some trial and error to make this intuitive for players.
can't wait to land on it and go 🙂🙃🙂🙃🙂🙃🙂🙃🙂🙃🙂🙃🙂🙃🙂🙃🙂🙃🙂🙃🙂
Many tweaks later, this is starting to take shape!
I increased the radius, added self-shadowing, rim walls and a mesh for the outside.
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Haha yes sorry about that. Sure! Sounds like it could be useful
A view from the surface of the ring world with the terrain curving up towards the top of the image.
But I just got the high-detail model to work! The changes to the terrain, ocean and cloud systems luckily didn't end up being too invasive.
Okay maybe I don't feel like adding the atmosphere just yet.
In theory it's "just" a matter of curving it the other way, but that is easier said than done.
The ring world closer to the ground with it curving away in the distance.
The ring world seen from far away.
And here's the initial low detail model! This is good as a first step to figure out how to generate and render a cylindrical world. The atmosphere is still missing, so that will be next.
This is very much a "not because it is easy" kind of project. But I'm sure it will be well worth it.
All the building blocks are already there, but it will still be a lot of work as I never anticipated having to support non-spherical celestial bodies, but here we are.
https://boac.artstation.com/projects/8eb00Q
Alright let's build a megastructure!
I've been reading Consider Phlebas by Iain M. Banks and can't resist adding a ring world to the game.
Starting a thread for this one 🧵
(image by @alexjaybrady.bsky.social for inspiration)
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Same scene but with 220 instead of 20 FPS.
With an improvised workaround we're back to a decent frame rate!
Hyperbole aside, I was able to reproduce it in just a few lines of code: github.com/bevyengine/b...
back at it now and boy do things look broken beyond belief
With that fixed, EntitySpecializationTicks is another map that just keeps filling up. The reason might be related. Time for a break for now though.
Ah I had this backwards. Them being removed means that the `contains_key` check can return false and the cleanup later can actually happen!
