vray rt GPU texture resolution above 512? plus Octane side note

[mcel0054]

Hello,
I'm fairly new to RT GPU and am having a problem getting my hdr in a dome light to be an acceptable resolution. for that matter, any texture doesn't seem to resolve above 512, even when I uncheck the box and set to 1000 or 2000. But when I switch back to cpu, it looks great. i Have an nvidia quadro 5000.

As a side note, I've been testing Octane and am impressed by the navigation and speed. I feel like vray can be at this level, but I'm not experiencing the same kind of performance that Octane has. I would prefer to stay with vray. Do I have a setting wrong that is suppressing my GPU performance? with vray rt CPU I get around 800 k/paths, with GPU I can get around 5000-10000 k/paths on a good day with scenes that don't have any textures. Thanks in advance.

[vlado]

I'm fairly new to RT GPU and am having a problem getting my hdr in a dome light to be an acceptable resolution. for that matter, any texture doesn't seem to resolve above 512, even when I uncheck the box and set to 1000 or 2000. But when I switch back to cpu, it looks great. i Have an nvidia quadro 5000.

You can try the following:
*) Uncheck the "Resample textures for GPU" option;
*) Increase the resolution setting in the dome light;

I feel like vray can be at this level, but I'm not experiencing the same kind of performance that Octane has.

Do you mean performance or interactivity? By default V-Ray does 16 samples per pixel on the GPU, whereas I believe Octane does just one. So V-Ray needs more time to produce an initial image. You can reduce the initial samples per pixel to increase the interactivity (although performance would suffer somewhat).

with vray rt CPU I get around 800 k/paths, with GPU I can get around 5000-10000 k/paths on a good day with scenes that don't have any textures.

So how much do you get with Octane? Although actually that's somewhat irrelevant; a more accurate test would be to measure the image quality after a certain time of rendering (with path tracing for Octane).

Best regards,
Vlado