Verge 3.8 appInstance.renderer.setPixelRatio(..) downscaling picture?

Tagged: display, lod, pixel ratio, quality, resolution, retina

This topic has 5 replies, 3 voices, and was last updated 3 years, 1 month ago by precismo.

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2021-10-04 at 9:05 am #45794

precismo
Customer

Hi Verge,

We have noticed that after update to Verge 3.8, our images become noticably more blurry on both Android na IOS mobile devices. Further investigation showed that same settings for appInstance.renderer.setPixelRatio(window.devicePixelRatio) works differently – please refere to screenshot for 3.8 from Android (IOS is experiencing same behavior).

I would expect that setting pixel ratio to native device resolution would lead to very sharp image (+ slow performance) but it seems that 3.8 is doing further downsampling. This was not happening in previsous Verge versions where image was sharp.

Im afraid that if we set pixel ratio artificially further up above window.devicePixelRatio, all our repositories on older engine versions will start crashing.

May I ask how to solve this? Is this new feature of underlying Three.js?

Thank you very much in advance,

Petr from Precismo

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2021-10-04 at 9:19 am #45796
Alexander Kovelenov
Staff
Hi,
It’s possible you forgot to apply pixel ratio for postprocessing pass as well which is now required:
```
    // already have maximum pixel ratio in HiDPI mode
    if (!appInstance.useHiDPIRenderPass)
        appInstance.renderer.setPixelRatio(factor);

    if (appInstance.postprocessing)
        appInstance.postprocessing.composer.setPixelRatio(factor);

    // to update possible post-processing passes
    appInstance.onResize();
```
Soft8Soft Tech Chief
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2021-10-05 at 12:26 pm #45852

web
Customer

Sorry to hjack this thread. But does that change also affect the “app.enableSSAA(1);”. Because it doesnt seem to work anymore?

2021-10-05 at 1:54 pm #45854

Alexander Kovelenov
Staff

No, it should not affect SSAA rendering. BTW I’d suggest using app.enableSSAA(4) to improve quality, since 1 means using just 2 samples for AA.

Soft8Soft Tech Chief
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2021-10-05 at 1:55 pm #45855

Alexander Kovelenov
Staff

In general, I’d suggest sticking to one of these – either increase sampling ratio or use super-sampler AA for your app. Not both.

Soft8Soft Tech Chief
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2021-10-06 at 3:52 am #45950

precismo
Customer

Thank you very much Alexander, this fixed the issue!
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