Glass and Water - How?

Discuss or ask critique about your current works
Forum rules
Important notice: All artwork submitted on our public gallery forums gallery forums may or may not be used by OTOY for publication on our website gallery.
If you do not want us to publish your art, please mention it in your post clearly. (put a very red small diagonal cross in the left right corner of the image)
Any images already published on the gallery will be removed if the original author asks us to do so.
We recommend placing your credits on the images so you benefit from the exposure too, and use a minimum image width of 1200 pixels, and use pathtracing or PMC. Thanks for your attention, The OctaneRender Team.

For new users: this forum is moderated. Your first post will appear only after it has been reviewed by a moderator, so it will not show up immediately.

This is necessary to avoid this forum being flooded by spam.
Post Reply
User avatar
RobSteady
Licensed Customer
Posts: 618
Joined: Thu Jun 07, 2012 7:33 am
Contact:
Contact RobSteady

In the test on the bottom the water is inside with a 3mm offset. When it's outside the water line disappears and you can barely see the water.
Realistically it should render like the one in the middle:

Image

Should the water overlap the glass geometry?
Another question: Had a hard time to set up a good looking white transluscent glass material (vase on the left) that does not produce an insane amount of hotpixels. Anyone?
Attachments
Water_Test_001.jpg
Octane for 3ds Max v2.21.1 | i7-5930K | 32GB | 1 x GTX Titan Z + 2 x GTX 980 Ti
Top
User avatar (Default)
kavorka
Licensed Customer
Posts: 1351
Joined: Sat Feb 04, 2012 6:40 am

Dont create new geometry for he water. Take the glass where the water would touch, asign the water material and flip the normals. The cover the top
Intel quad core i5 @ 4.0 ghz | 8 gigs of Ram | Geforce GTX 470 - 1.25 gigs of Ram
Top
User avatar
RobSteady
Licensed Customer
Posts: 618
Joined: Thu Jun 07, 2012 7:33 am
Contact:
Contact RobSteady

Tried that but then I get wired shading artifacts where the faces are intersecting...
Octane for 3ds Max v2.21.1 | i7-5930K | 32GB | 1 x GTX Titan Z + 2 x GTX 980 Ti
Top
User avatar (Default)
kavorka
Licensed Customer
Posts: 1351
Joined: Sat Feb 04, 2012 6:40 am

There shouldnt be any intersecting faces. The surface where the glass and water would touch is only the water material with the normals pointing towards the outside of the glass.
Intel quad core i5 @ 4.0 ghz | 8 gigs of Ram | Geforce GTX 470 - 1.25 gigs of Ram
Top
User avatar
roeland
OctaneRender Team
Posts: 1823
Joined: Wed Mar 09, 2011 10:09 pm

You should use the method in the middle. The edge looks weird because the overlap gets too narrow near the edge. Try to make the overlap taper off with a less acute angle.

For the vase, you can either switch on the fake shadows setting in the vase glass material, or you can increase the caustic blur setting in the kernel.

--
Roeland
Top
User avatar
Ron
Licensed Customer
Posts: 370
Joined: Sun Sep 25, 2011 7:11 pm

Maybe this will help:

http://render.otoy.com/forum/viewtopic.php?f=23&t=649

Ron
Master: WIN 10 64bit, i7 4930 4,5 Ghz, 64 GB RAM, 1600 W PSU, 1 TB SSD, 14 TB RAID, 2 x RTX 3090
Top
Post Reply

Return to “Works In Progress”