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Surface Rendering Fragment Shaders Are Inefficient


Timmons

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I am going to link to my posts on twitter here:

And:

This hasn't been touched in the latest patch and it is the major bottleneck as far as I can tell when profiling.

There are other instances of bad expensive shaders too. 

In Renderdoc for some of these, if you replace them with a fixed colour it doesn't really impact the overall look or change much (specifically the write to the big bad RGBA32 textures at the space centre which seem to not be correctly packed?)

Tried running latest patch on all low. Seeing the same problems.

Are the devs actually aware of this?

Because when replace the shader in renderdoc (or hide the planet) I get a happy 120fps.

 

 

 

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Reported Version: v0.1.4 (latest) | Mods: none | Can replicate without mods? Yes 
OS: Windows 10 | CPU: AMD Ryzen 5 3600 | GPU: NVIDIA GeForce GTX 1070 | RAM16GB

 

The closer my vessel is to a celestial body, the lower my framerate is while that celestial body is in view.

 

Edited by Anth12
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On 8/31/2023 at 5:21 PM, Dandoesstuff said:

this is due to the terrain system i think. they're working on a new terrain system called CBT or something like that i forgot

yeah! Before v0.1.4.0, everything goes so smooth..but after the patch, it keeps scattering everytime i play! Even if no ships in the campaign!

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On 8/31/2023 at 6:10 PM, Anth12 said:

@Timmons Pulled this bug report out of the archive.

Link?

1 hour ago, Vortygont said:

Does somebody think that framerate downgrade in atmosphere and in low orbit is memory leak? Because it looks like memory leek for me but I don't have evidence

 

Worse, I bet it is that nasty geometry buffer GPU memory leak.

Slow memory leaks in the CPU-Side are often able to be cleaned up by the GC, or at worst the OS can throw them into VM. 
The GPU typically has no such options.

I understand if this is legacy code from a previous project and they are going to declare critical mass on this.  They might want to hurry up if this is the case.

Edited by Ruedii
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9 hours ago, Infinite Aerospace said:

Kenny, do you get sudden and incredibly profound drops in frame rate? I'm experiencing similar problem going from low 40 FPS to 1 - 4 FPS.

I know! It happens once every 10 - 20 seconds for keep frustrating between 60 - 1 FPS in the entire campaign...even if no ships around! 

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4 hours ago, kennyc222 said:

I know! It happens once every 10 - 20 seconds for keep frustrating between 60 - 1 FPS in the entire campaign...even if no ships around! 

It doesn't happen that often for me like, I get it just on the initial ascent to orbit, it'll be fine then the frame-rate will tank, and then it'll be alright again.

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