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Environment Map Question


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I am building a rman reflective surface shading network in Houdini 7. I am using an environment map as reflected colour by using the reflect() and RSL environment(). But there seems to have some space problem in the final rendered result. I already use "transform" vop to change the space from "current" to "world". But the reflected image still does not look all right. I think I just need to rotate the environment sphere by 90degrees around X axis. Does anyone know how I can fix it? Pls help! Any help will be highly appreciated!

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