Overview of OSL Shaders in Octane Tweet

[FrankPooleFloating]

Has anyone used osl/toon stuff to do any technical drawing type renders by any chance?.. I have to bang out a couple in the next couple weeks, and ordinarily I would render something and trace it in AI, which is rather time-consuming...

[leehenshall]

Outlines via OSL might be a good companion for the new toon shader. I've not seen any OSL shaders for this type of thing yet.

[leehenshall]

Found this?

https://www.blendswap.com/blends/view/67827

Can this be applied to Octane?

[leehenshall]

Another one:

https://www.blendswap.com/blends/view/68518

[SergKlyosov]

Hi guys,

Can anyone write OSL which allows to use UDIM inside octane?
I think is highly requested feature and seems it won't be implemented soon as core function, so maybe there is some way to do it with OSL now?

Thank you

[roeland]

It won't be a core feature in 3.08.

You can achieve tiling with OSL but you'd have to create a long shader which picks the right tile from a list of inputs.

Code: Select all

shader Tiles_2_by_4(
    string Tile_1_1 = "",
    string Tile_1_2 = "",
    string Tile_1_3 = "",
    string Tile_1_4 = "",
    string Tile_2_1 = "",
    string Tile_2_2 = "",
    string Tile_2_3 = "",
    string Tile_2_4 = "",
    output color c = 0)
{
    string f;
    float modU = u * .25;
    modU -= floor(modU);
    float modV = v * .50;
    modV -= floor(modV);
   
    if (modU < .25)
    {
        if (modV < .50) { f = Tile_1_1; }
        else            { f = Tile_2_1; }
    }
    else if (modU < .50)
    {
        if (modV < .50) { f = Tile_1_2; }
        else            { f = Tile_2_2; }
    }
    else if (modU < .75)
    {
        if (modV < .50) { f = Tile_1_3; }
        else            { f = Tile_2_3; }
    }
    else
    {
        if (modV < .50) { f = Tile_1_4; }
        else            { f = Tile_2_4; }
    }
   
    c = texture(f, u - floor(u), v - floor(v), "wrap", "clamp");
}

In practice in the standalone you'd build up that shader with a Lua script.

The next step is getting the image files connected. How much tiles would you have in the typical UDIM shader, and how do you get them in and out of other programs?

[SergKlyosov]

Thank you a lot, Roeland!
It is magnificent!

BTW, I have one question
In Octane we have two different type of image nodes: RGB Image and Greyscale image
And there is a pretty huge difference of using VRAM between those two types.
1)If I'm using the same monochrome 8K map from MARI and plug it in to RGB image - scene cost 1.3GB of VRAM
2) if I'm using the same monochrome 8K map from MARI and plug it in to Greyscale image - scene cost 0.5GB of VRAM

So how I can change type of output in that OSL code? Cause obviously if I use this OSL with bump, roughness etc - I don't need RGB image output

Thank you so much for the help

Cheers

[coilbook]

can anyone make a sparkle shader like for snow? Or can otoy do it? I think it is a very necessary shader Thank you

[paride4331]

can anyone make a sparkle shader like for snow? Or can otoy do it? I think it is a very necessary shader Thank you

Hi coilbook,
could flake osl to help?
https://render.otoy.com/forum/viewtopic.php?f=27&t=66015
Regards
Paride

[coilbook]

can anyone make a sparkle shader like for snow? Or can otoy do it? I think it is a very necessary shader Thank you

Hi coilbook,
could flake osl to help?
https://render.otoy.com/forum/viewtopic.php?f=27&t=66015
Regards
Paride

Thanks Paridie but how can you make those flakes sparkle. I tried mix texture with flake as a mix texture and they still dont sparkle at angles like in this video https://youtu.be/qpPQk5fNrho?t=1m10s

also I thought it is a procedural material why mapping looks off where circles are oval.

Thank you