OTOY Forums

Hello

I am trying some fluid dynamics inside blender...

But when I compare the rendering from a specific time with the animation the look is totally different:

Still image from fluid simulation:
And this is a screen shot from the animation:
Both images are taken at frame 60.


Rendering the animation in Cycles looks correct like the still image.

Constant crashing during rendering is another thing (o;

Really weird...first two frames are correct, then the water material gets dark and stays that way...

Frame 0:
Frame 1:
Frame 2:

Interesting to note....

when Cycles and Octane are both set to 200 samples limit, Cycles with CUDA using a GTX1060 6GB on Linux is way faster than Octane with a GTX1080 TI running on macOS.

Octane GTX1080 TI:
Cycles GTX1060

Wrong animation rendering with Octane for Blender:

https://youtu.be/L51M3ASxoAc

Correct rendering of animation with Cycles:

https://youtu.be/Pn_uVDM4H3E


It looks to me like OctaneRender always uses the maximum mesh extent of the fluid
and doesn't take into account newer smaller mesh dimensions.

Okay...got it....seems the Flip Fluids demo plugin doesn't auto-detect Octane as the commercial version does...

So you need to set the Mesh to "global" for the fluid...

But black frames in animation rendering still persist...

really strange, I am using flip fluids with octane and have never seen this. Isn't there some rogue keyframe in your node editor?

edit: Some of the frames are rendering black, i've seen this with octane 4 version, which one are you using?

Switched back to 3.08....no problems then (o;

I'll check FLIP Fluids in Octane 4 again.
Never had issues with the render.