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Refraction incorrect with CUDA

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  • Refraction incorrect with CUDA

    Sorry for the bunch of threads lately but I keep finding things here and there with RT.

    This time I'm having issues with refractions in car windows. They render correctly with the Advanced renderer and RT CPU but come out strange with RT CUDA. The glass material itself is pretty simple - VrayMtl with nearly white reflection color, slightly blue refraction color and turned on "Reflect on back side". Everything else is at default. Also all glass objects have thickness.

    Here's the screenshot with the results. Notice the strange refraction of the side mirror:

    Click image for larger version

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    Max 2023.2.2 + Vray 6 Update 2.1 ( 6.20.06 )
    AMD Ryzen 7950X 16-core | 64GB DDR5 RAM 6400 Mbps | MSI GeForce RTX 3090 Suprim X 24GB (rendering) | GeForce GTX 1080 Ti FE 11GB (display) | GPU Driver 546.01 | NVMe SSD Samsung 980 Pro 1TB | Win 10 Pro x64 22H2

  • #2
    Please send a scene at peter.matanov@chaosgroup.com.
    If it was that easy, it would have already been done

    Peter Matanov
    Chaos

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