Some wish items for GPU rendering

[andybot_cg]

I'm finding more places I can use GPU rendering, but I'm still finding some roadblocks to being able to make full use of it. There are a few nodes that I would really like to see supported in GPU rendering. Here is the start of a list, roughly in order of priority:

1. Color correction (first one on the list)
2. Sampler (In particular Random by RenderID seed) Edit: there was a problem with remap, now fixed. Thanks!
3. "Float 3 to A color" and "Vector Curves" (for complex IOR setups) (Edit: was using an old color combine node, it's working with current nodes)

I'm sure there are more, and I'd be interested to see what other nodes others use that could benefit from GPU support.

In general though, I am much appreciative of how far GPU support has come. Many thanks!

Andy

[poseidon4o]

Can you upload test scene please?

[andybot_cg]

Here's a test file. Glad to say curves are working - looks like perhaps I was using an old node, so scratch item #3

[poseidon4o]

Thank you for the scene. Just a note - there seems to be a bug with Remap while Random By RenderID Seed works - you can try with Float 3 To AColor for example.

[andybot_cg]

Is it possible to fix remap for GPU? It's a critical node for vegetation. Thanks!

[poseidon4o]

Is it possible to fix remap for GPU? It's a critical node for vegetation. Thanks!

Yes - it should start working with next nightly.

[andybot_cg]

Yes - it should start working with next nightly.

Excellent! Glad to hear you have a fix. Any chance for the Color Correction to be addressed as well?

[poseidon4o]

Excellent! Glad to hear you have a fix. Any chance for the Color Correction to be addressed as well?

For GPU you should use the second "Color Correct":

[andybot_cg]

OK, thanks for the pointer. I'll try that out.

[andybot_cg]

Thanks for the working remap!!

For GPU you should use the second "Color Correct":

Close, but alas, not quite. For some reason the node does not colorize the input, it replaces with a solid color in GPU.
Sample file attached.

Andy

[andybot_cg]

oops, it's the "projection" mapping node that's broken, not the color node.

[afecelis]

Nice tests andy! My main wish for GPU rendering is the possibility to use it as production renderer and having as many of its features translated into it. So far scenes look too different when rendering with CPU/GPU

[savage309]

Nice tests andy! My main wish for GPU rendering is the possibility to use it as production renderer and having as many of its features translated into it. So far scenes look too different when rendering with CPU/GPU

Render results will never match completely between CPU & GPU (they are different engines). This is not our goal (check this http://dabarti.com/vfx/short-guide-t...with-v-ray-rt/). So switching mid-project between those most often will not work. Although they should be rather close. If they are not, it can be bug.

Best,
Blago.

[andybot_cg]

savage309 I am interested in working on projects in GPU from the start, but I keep running into features that are lacking so I keep being stuck to CPU only. I want to make sure I have a working material library when interactive rendering finally comes to V-Ray for Blender

[savage309]

If you start with the GPU, you will probably end up finding things that work on the GPU, but doesn't on the CPU The GPU works fine for many clients that have switched to it for production rendering.

Best,
Blago.