cloudfx Posted May 5, 2008 Share Posted May 5, 2008 Hi all, I made a simple tiff file with letters and alpha channel in photoshop. I brought it to houdini and assigned it to a geometry. I wanted to render only letters in houdini, but when I rendered it, the alpha does not work only for letters. It rendered without alpha channel. How do I let houdini know there is alpha channel? Here is the scene file with the tiff file! so can some1 please look at the file and what should I add? Thank you very much! hipfile_ta.zip Quote Link to comment Share on other sites More sharing options...
sibarrick Posted May 5, 2008 Share Posted May 5, 2008 Just change the "Texture Tints" parameter on the shader to diff+alpha Quote Link to comment Share on other sites More sharing options...
Alanw Posted May 5, 2008 Share Posted May 5, 2008 (edited) Hi all,I made a simple tiff file with letters and alpha channel in photoshop. I brought it to houdini and assigned it to a geometry. I wanted to render only letters in houdini, but when I rendered it, the alpha does not work only for letters. It rendered without alpha channel. How do I let houdini know there is alpha channel? Here is the scene file with the tiff file! so can some1 please look at the file and what should I add? Thank you very much! I've attached a fixed version of your file. Make sure to notice I've changed the texture options on your shop from "diffuse" to "diffuse + alpha". This will give you the desired result. Also, if you create a VOP network yourself you can simply tell the Texture VOP to export a vector 4 (RGBA) instead of RGB. The 4th component wired into the Af output will give you the same results. edit - I must be going crazy, I didn't see sibarrick's response test.hipnc Edited May 5, 2008 by Alanw Quote Link to comment Share on other sites More sharing options...
cloudfx Posted May 7, 2008 Author Share Posted May 7, 2008 I've attached a fixed version of your file. Make sure to notice I've changed the texture options on your shop from "diffuse" to "diffuse + alpha". This will give you the desired result. Also, if you create a VOP network yourself you can simply tell the Texture VOP to export a vector 4 (RGBA) instead of RGB. The 4th component wired into the Af output will give you the same results. edit - I must be going crazy, I didn't see sibarrick's response Thank you very much! Quote Link to comment Share on other sites More sharing options...
masstapro Posted September 13, 2012 Share Posted September 13, 2012 I know this is an old thread, but I'm stuck on the same thing with the Decal Shader in Houdini 11. Don't understand why it doesn't just read a .tif alpha in on it's own. Looks like I have to dive into the shader and wire it. Am I correct? ~Shawn Quote Link to comment Share on other sites More sharing options...
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