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

Rob East east.robert at gmail.com
Wed Apr 18 23:47:08 EDT 2012


Hi, 
     Creating a subnet then otl from a direct diffuse export parameter node within a mantra surface shader works here on H build 12.0.586. Feel free to email the otl and simple test scene if you wish

Rob




Robert East
T: +61 0424648857
W: www.tenmenmarching.com
Sydney Australia

From iPhone 




On 19/04/2012, at 12:39 PM, Campbell McGrouther <campbell.mcgrouther at rsp.com.au> wrote:

> 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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