OTOY Forums

Posted: **Fri Mar 22, 2019 6:09 am**

Can anyone explain (and, preferably, attach a working c4d file) how to work with OSL Camera script "texture aperture cam"?
No matter what I do, I get the same black screen.
I follow the instructions, but it doesn't work for me [picture_of_a_sad_cat.jpg]

Posted: **Fri Mar 22, 2019 6:54 am**

You should use OSL Delayed UV projection in the ImageTexture node (I guess you already used that but I need to make sure). That's the only requirement.

BUT unfortunately it will not work because there is a bug in the C4D Octane plugin for color inputs in the camera shader. Because of that bug ImageTexture node will be ignored.

Cheers
Milan

Posted: **Fri Mar 22, 2019 9:30 am**

milanm wrote:You should use OSL Delayed UV projection in the ImageTexture node (I guess you already used that but I need to make sure). That's the only requirement.

BUT unfortunately it will not work because there is a bug in the C4D Octane plugin for color inputs in the camera shader. Because of that bug ImageTexture node will be ignored.

Cheers
Milan

so, for now it appears to be useless, right?

Posted: **Fri Mar 22, 2019 9:59 am**

FullHPetroL wrote:
milanm wrote:You should use OSL Delayed UV projection in the ImageTexture node (I guess you already used that but I need to make sure). That's the only requirement.

BUT unfortunately it will not work because there is a bug in the C4D Octane plugin for color inputs in the camera shader. Because of that bug ImageTexture node will be ignored.

Cheers
Milan
so, for now it appears to be useless, right?

If you use it as it is, then yes, that's true.

The code can be easily changed, however, to use builtin OSL texture() function instead of _evaluateDelayed(). That could work, but then you're facing another problem because the file paths will have to be absolute and if you save project with assets your aperture texture will not be included. Also you will not be able to take advantage of texture compression and other settings we have in the ImageTexture node.

In that case you would have to change the apertureTexture input to a string value (file path) instead of color.

Cheers
Milan

Posted: **Fri Mar 22, 2019 10:14 am**

milanm wrote:You should use OSL Delayed UV projection in the ImageTexture node (I guess you already used that but I need to make sure). That's the only requirement.

BUT unfortunately it will not work because there is a bug in the C4D Octane plugin for color inputs in the camera shader. Because of that bug ImageTexture node will be ignored.

Cheers
Milan

Don't know what are you saying here as bug, would be great to point me that. BTW parameters are not magically appear in plugins. It has to implement for every types and cases. It's a complex part in plugin. Not a bug if I missed some cases.

Posted: **Fri Mar 22, 2019 10:28 am**

aoktar wrote:
milanm wrote:You should use OSL Delayed UV projection in the ImageTexture node (I guess you already used that but I need to make sure). That's the only requirement.

BUT unfortunately it will not work because there is a bug in the C4D Octane plugin for color inputs in the camera shader. Because of that bug ImageTexture node will be ignored.

Cheers
Milan
Don't know what are you saying here as bug, would be great to point me that. BTW parameters are not magically appear in plugins. It has to implement for every types and cases. It's a complex part in plugin. Not a bug if I missed some cases.

Aoktar, I thought I did smth wrong and couldn't get the result. And as the custom OSL script for camera was available, I concluded it had to work.
So, I would like to point that this issue exists. Files are attached.

Posted: **Fri Mar 22, 2019 1:08 pm**

@Ahmet

There is nothing to miss, OSL documentation is very clear about what inputs can be used. And there is not that many of them.

Color input in the camera shader doesn't work. You can see that the RGBSpectrum node is connected but it's missing in Octane.

This camera will not render black if any non black color is connected on the color input:

Code: Select all

shader OslCamera(

		 // Here is the color input
		 // In order for this camera to work you need to connect
		 // any color input here, RGBSpectrum, ImageTexture, FloatTexture... anything.
		 color ColorInput = 0,       

	   output point  pos  = P,
	   output vector dir  = 0,
	   output float  tMax = 1.0/0.0)
{
		float pa;
		int res[2];
		getattribute("camera:pixelaspect", pa);
		getattribute("camera:resolution", res);
		float aspect = pa * res[1] / res[0];
		vector right = cross(I, N);
		
		if (ColorInput != 0)
			dir = I + right * (u - .5) + N * (v - .5) * aspect;
		else
			dir = 0;
}

As you can see it works in Standalone if we add any other color than black:

In Cinema 4D we get this:

Regards
Milan

Posted: **Fri Mar 22, 2019 5:05 pm**

I've tested it. It's a different issue than you estimated. Due to a missing parameter in my osl compiler and iterator function. I'm fixing it.

Posted: **Sun Mar 24, 2019 6:28 pm**

Here's fixed build
viewtopic.php?f=85&t=71065

Posted: **Mon Mar 25, 2019 1:40 am**

aoktar wrote:Here's fixed build
viewtopic.php?f=85&t=71065

Please, verify it is working, for It doesn't work for me.

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