Compose renders in shader builder

almahiedra

I need help with shader builder.

With two shaders (shader A and shader B) I obtain two renders which I want compose in shader builder. I want compose the renders, compose shaders is imposible because shader A destroy shader B then mix function is useless. Anyone have an idea to do it?

I do a composition with postwork, but the idea is obtain all with shaders. I add renders and postwork composition.

Takeo.Kensei

Hi,

I recall reading a paper about npr rendering in renderman that used a tip in which you render the object scaled a bit bigger for the outline then render the object with a toon shader and combine the two. That seems to be what you're looking for. I can't remember exactely but I think it was a two pass render so you may also need to use DS scripting; Sorry I can't remember where I read it but I do recall that it also involved backface culling, so that you only render what is behind the object you want to render

An other way to do that could be to use ImageMagick to combine the two rendering

Chohole

Please note that nudity is not allowed in the forums, as [er the forum TOS, Please review the TOS here, espceially the first bullet point in the gerenal code of conduct. Thanks. http://www.daz3d.com/forums/discussion/6_4/

almahiedra

chohole said:

Please note that nudity is not allowed in the forums, as [er the forum TOS, Please review the TOS here, espceially the first bullet point in the gerenal code of conduct. Thanks. http://www.daz3d.com/forums/discussion/6_4/

Sorry, I quickly transform her in a decent girl.:red:

almahiedra

Takeo.Kensei said:

Hi,

I recall reading a paper about npr rendering in renderman that used a tip in which you render the object scaled a bit bigger for the outline then render the object with a toon shader and combine the two. That seems to be what you're looking for. I can't remember exactely but I think it was a two pass render so you may also need to use DS scripting; Sorry I can't remember where I read it but I do recall that it also involved backface culling, so that you only render what is behind the object you want to render

An other way to do that could be to use ImageMagick to combine the two rendering

Thanks, Takeo.

Yes, DS Scripting is the optimal solution, but not the fast solution. I need time, time and more time to learn.

ReDave

That's a nice shader you've got there.

gilikshe said:

I want compose the renders, compose shaders is imposible because shader A destroy shader B then mix function is useless.

Are you sure it's impossible? I'm fairly confident you can pretty much always mix a number of shaders (e.g. pass values to temporary variables, in particular pass the value just before you add to Ci, and an "if then" here or there; although your outline shader probably doesn't have anything to add to Ci :-S ).

Takeo.Kensei

I think that the good way to go would be to use geometry shell rendered with backface culling inverted to get the outline and render the other shader as normal. That would be a single pass and no need to mix shader

almahiedra

ReDave said:

That's a nice shader you've got there.

gilikshe said:

I want compose the renders, compose shaders is imposible because shader A destroy shader B then mix function is useless.

Are you sure it's impossible? I'm fairly confident you can pretty much always mix a number of shaders (e.g. pass values to temporary variables, in particular pass the value just before you add to Ci, and an "if then" here or there; although your outline shader probably doesn't have anything to add to Ci :-S ).

Thanks, ReDave,

Black Silhoute is a displacement shader, toon filled is a surface shader. When I try to use a version of the brick from the displacement network in the surface network:

1.- It doesn't produce any transform, or
2.- If I add displacement brick output, it produce a white colored and broken silhoutte

For this reason I was thinking about mix renders, no bricks mix in one shader.
All toon filled shader is a mix of outline shader, plain color shader, and shadow control shaders (no included in the images), but I fail trying to integrate displacements in the mix.

almahiedra

Takeo.Kensei said:

I think that the good way to go would be to use geometry shell rendered with backface culling inverted to get the outline and render the other shader as normal. That would be a single pass and no need to mix shader

I supose it is different to trying to use displacements, but even use information fron normal vector. I will think in this, thanks.

almahiedra

Takeo.Kensei said:

I think that the good way to go would be to use geometry shell rendered with backface culling inverted to get the outline and render the other shader as normal. That would be a single pass and no need to mix shader

First experiment with geometry shell and outline in shader builder. No enough good with transparency, It needs more work.

DS4.5 Pro crash, and re-crash when I touch much the geometry shell.

almahiedra

Experiment # 2: transparent front is "some" better.

almahiedra

Experiment # 3:

Normal negatives visible, transformed normal from "world space" to "camera space". I was thinking this was better, but... what happen?

almahiedra

Experiment # 4: Non optimal results, but it now works.
I change transfomations and sign of normal.

Thanks guys for the ideas.

PD: Thanks Takeo for your Gooch shader, too

Takeo.Kensei

gilikshe said:

Experiment # 4: Non optimal results, but it now works.
I change transfomations and sign of normal.

Thanks guys for the ideas.

Congrats for succeeding in creating the shader. Looks good to me. I know there are other tech to get the outlines better and If I find them again I'll tell you so that you can optimize your shader

PD: Thanks Takeo for your Gooch shader, too

No problem you're welcome. I should update it because I changed some little things that give more control