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Show HN: Krita RGBA Tech – Bringing Realistic Metal to Life in Open-Source Art

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Re: Show HN: Krita RGBA Tech – Bringing Realistic Metal to Life in Open-Source Art

#31

Post by esperent »

jraph wrote: post #22
esperent wrote: post #10

Earlier quoted context omitted.

Very nice, I approve of anything that goes against the Material Design hegemony. One question though: there's a (relatively) large delay updating the demo when I change the convexity. Is this something that comes from the update script or is the effect itself slow? Because I don't think I've ever seen a CSS effect that takes a half second to update before.

There are a lot of canvas in there, I doubt CSS is involved much in drawing this effect.

I checked out the source, there's only a single canvas being used to render a base64 PNG. The PNG is just a 400x400 spherical reflection map, which is basically a required component of any metallic effect. I don't think that would cause a slowdown.

Re: Show HN: Krita RGBA Tech – Bringing Realistic Metal to Life in Open-Source Art

#32

Post by short_sells_poo »

draneria wrote: post #27
short_sells_poo wrote: post #14

Earlier quoted context omitted.

Photoshop and other painting software had "intelligent" brushes for a while now. These try to simulate stuff like paint mixing (even watercolor), opacity and texture.

Could you give me an example? I'd love to know more about the watercolour paint mixing. If you meant the "live tip" settings of Photoshop, you can do all that in Krita too, using the "texture", and "mask tip" features. RGBA seems to definitely be something Krita has over Photoshop, but I could well be wrong! by the way, there are other softwares like Rebelle that try to truly simulate traditional mediums - bordering…

It's been a while, but a bit of googling turned up this: https://www.adobe.com/uk/learn/fresco/web/realistic-watercol...

Re: Show HN: Krita RGBA Tech – Bringing Realistic Metal to Life in Open-Source Art

#33

Post by michael0x11 »

Pretty neat tech - the RGBA brush engine in Krita is doing something fundamentally different from PS's basic alpha masks. Being able to encode directional data in the brush tip itself opens up some interesting rendering possibilities. Been messing with similar effects in PS using layer styles but this seems way more efficient.

Re: Show HN: Krita RGBA Tech – Bringing Realistic Metal to Life in Open-Source Art

#34

Post by draneria »

michael0x11 wrote: post #33

Pretty neat tech - the RGBA brush engine in Krita is doing something fundamentally different from PS's basic alpha masks. Being able to encode directional data in the brush tip itself opens up some interesting rendering possibilities. Been messing with similar effects in PS using layer styles but this seems way more efficient.

Exactly! it is really incredible. I've not used Photoshop much, I'd be curious to know how the two face-off in the realm of brush features haha

Re: Show HN: Krita RGBA Tech – Bringing Realistic Metal to Life in Open-Source Art

#35

Post by draneria »

short_sells_poo wrote: post #32
draneria wrote: post #27

Earlier quoted context omitted.

Could you give me an example? I'd love to know more about the watercolour paint mixing. If you meant the "live tip" settings of Photoshop, you can do all that in Krita too, using the "texture", and "mask tip" features. RGBA seems to definitely be something Krita has over Photoshop, but I could well be wrong! by the way, there are other softwares like Rebelle that try to truly simulate traditional mediums - bordering…

It's been a while, but a bit of googling turned up this: https://www.adobe.com/uk/learn/fresco/web/realistic-watercol...

Damn that really does look cool (｡•́︿•̀｡) it seems like I have my work cut out for me, I'd love to have that "animated feel" in a Krita brush. I do have some ideas - I might not get anywhere but who knows :D
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