This started happening on every single render I did upon updating to the latest version of Vray at the beginning of this year. After reverting back to a 2024 build, it pretty much stopped happening. But lately it's popping up in my renders every once in a while (though not nearly as often or widespread as when I updated to the 2025 build).
Basically, with grasses and wood chips, I get these random, very ugly blurry/smudgy patches in my scatters. Has anyone else seen this? If it's been brought up before I apparently didn't know the correct keywords to look for as I found nothing.
Attached examples 00, 01, and 01B: Recent renders with much smaller patches of blurred surface
Attached example 02: Render from early in the year when updating Vray to 2025 build. Blurry patches are FAR more widespread but similar in characteristics.
Reddish Magenta outlines: Blurry areas
Green outlines: Desired look
Orange outlines: Odd lack of denoising, causing "fireflies" from 2025 build renders
I suspect it has something to do with the denoising pass? As you can see in 01B (bottom left is origRGB pass and top right is denoiser pass), the origRGB image comes out with the suspected fireflies but the woodchips are detailed; the denoiser pass is when everything gets hosed.
Any help is greatly appreciated since:
the denoiser pass is a required aspect to GPU rendering,
Chaos says talk to itoo,
reverting to CPU is just straight not an option with the monetary and time investment I've made in model conversions, model purchases, and hardware/software purchases; not to mention the exponentially longer render times.
Topic: Seemingly random blurry patches - Vray GPU (Read 25 times)
