[Sidefx-houdini-list] Exporting parameters from an OTL, to an image plane.

Campbell McGrouther campbell.mcgrouther at rsp.com.au
Wed Apr 18 22:39:10 EDT 2012


Hey Rob,
They all have inputs, all hooked up. I did that test already, and it 
gives the exact same result as the example I provided.



On 19/04/12 12:06, Rob East wrote:
> Hi,
>       To export a value in your shader as an image plane it does need a input.
> A simple test would be to crack open a mantra surface shader create a simple color parameter and then create a export parameter. In your Rop add the export parameter you just created then render.
>
> Rob
>
>
>
> Robert East
> T: +61 0424648857
> W: www.tenmenmarching.com
> Sydney Australia
>
>  From iPhone
>
>
>
>
> On 19/04/2012, at 12:08 PM, Campbell McGrouther<campbell.mcgrouther at rsp.com.au>  wrote:
>
>> Hey all.
>>
>> I have been trying to revive an old OTL I made a couple of years back, that simply had a bunch of parameters that were exported from a shader, to image planes. This seems to no longer work, and can be basically replicated by doing the following:
>>
>> Create a mantraSurface.
>> Add an image plane set to 'diffuse_color_export'
>> Render. You'll see a result here ...
>> Select the 'diffuse_color_export' parameter node and convert it to a subnet.
>> Render. You'll see a result here ...
>> Take the subnet, and 'Create Digital Asset'.
>> Render. Now you get no result.
>>
>> This confuses me, as I'm sure it used to work fine. I can force the OTL to export those parameters by hooking them up to an output, and feeding them into something else, but that's not ideal.
>>
>> The 'surfaceModel' seems to be able to work as an OTL, and export the parameters like 'direct_diffuse' just fine, so I'm stuck as to why it wont work for me.
>>
>> Thanks!
>> Campbell.
>>
>>
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