Refraction issues

[sprayer]

Is this what you want to achieve?
As i suggest i made closed shape from small plane and have to turn off cast shadows from small plane

[Flavius]

Hi,

Thanks for looking into this I kind of understand what you did but when rendering I need only the small plane, the thing is I cannot make the small plane to a box. Here, I am attaching another image to try and explain my issue. This is what I need.

To try and explain the situation I made a hole in the bigger water plane and simply attached my wave mesh. See how the refraction behavior changes. This does not seem normal to me. I left a big gap between them just to showcase the peculiarity.

[PROH]

@Flavius - just an idea (haven't tested it). What happens, if you attach 4 tiny meshes, placed at the outer corners of the big mesh, to the small mesh? This way the small piece gets the same bounding box as the big piece.

As I said, I haven't tested it.

Hope it helps

[Flavius]

@Flavius - just an idea (haven't tested it). What happens, if you attach 4 tiny meshes, placed at the outer corners of the big mesh, to the small mesh? This way the small piece gets the same bounding box as the big piece.

As I said, I haven't tested it.

Hope it helps

I was thinking of a similar thing last night, I will test it out and see how it behaves. ty

[maru]

Try rendering this with the following option and see if it changes anything:
1) Enable devel/debug settings - https://coronarenderer.freshdesk.com/support/solutions/articles/12000021288
2) Go to Performance > Development/Experimental stuff
3) Enable "Use legacy medium resolving" at the top, right under "Basic configuration"

[Flavius]

@PROH the trick didn't work, I left some polygons on the edge of the big plane, attached my waves mesh, it does change the appereance a bit, but only a tiny bit (which is absurd anyway as the polygons are really far away and there's nothing else between them and the mesh)

@maru- using legacy makes no difference sadly :(

Oh well...

[Flavius]

!!! I have literally went into rage mode and I've started to change all the parameters from the developer rollout in Corona. Embree on/off, Pathtracer, VCM, Light Tracer, PPM, VPL, terminat shandling, adaptivity on off literally everything.

AND THEN... (David Gilmour song reference)

I noticed the setting "ENVIRO DISTANCE" !!!! I have lowered that to 500m AND I get the identical results regardless if there's a smaller plane or a big plane. Still the values seem messed up to me and this only works with the Distance parameter in volumetric scattering is higher than the enviro distance. I had to lower my ground plane at -300 meters otherwise my water would've been too transparent, and the planes would have very different refraction results (So the problem I had before but more accentuated). I have just discovered this so I am still looking into the numbers.

EDIT: overjoy too soon, at different angles there are differences again but smaller...I hope I can adjust them in post though.

[romullus]

Maybe try to add walls around your ocean so that refracted rays would always hit  some geometry and you don't have to fiddle with enviro distance.