Difference between revisions of "Houdini Octane"
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=== Shading instances with custom colors === | |||
Is a little more hands on than getting custom attributes | |||
If you have a single object that you want to instance but have it have a random shader (in my example, using color), you can use a trick/weird workaround. | |||
To make it work: | |||
* in your scattered points (the ones that hold @instance, @orient, @pscale, @Cd) /obj/ level geo, make sure you choose 'Packed RGBA Values from 'Cd' Point Attribute'. | |||
* in your instance shader, you need to grab 'Texture Instance Color' and go pick a .ppm texture that sits in the install directory of octane under the /tex folder called '''rgb4k_map.ppm''' | |||
* plug it in directly your diffuse or use it to drive other textures like a ramp in my example | |||
https://i.imgur.com/GZIUm2z.png | |||
=== Shadow catcher with diffuse bounce === | === Shadow catcher with diffuse bounce === | ||
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https://imgur.com/KsjjsQK.png | https://imgur.com/KsjjsQK.png | ||
=== Double sided material in Octane === | === Double sided material in Octane === | ||
Revision as of 12:03, 19 April 2024
Shading instances with custom colors
Is a little more hands on than getting custom attributes
If you have a single object that you want to instance but have it have a random shader (in my example, using color), you can use a trick/weird workaround.
To make it work:
- in your scattered points (the ones that hold @instance, @orient, @pscale, @Cd) /obj/ level geo, make sure you choose 'Packed RGBA Values from 'Cd' Point Attribute'.
- in your instance shader, you need to grab 'Texture Instance Color' and go pick a .ppm texture that sits in the install directory of octane under the /tex folder called rgb4k_map.ppm
- plug it in directly your diffuse or use it to drive other textures like a ramp in my example
Shadow catcher with diffuse bounce
I think default shadow catching doesn't get the bounce so you can whip it up with a rayswitch. I sort of plugged stuff into stuff for it to work (topright pigheads -- bottom left is normal shadowcatcher,plane grid is a green material):
(also i cropped the rayswitch like an idiot but camera ray is at 0 the rest at 1
Double sided material in Octane
You can use tool_polygon_side to drive a material mixer:
