two glass issues

[daros]

Hi, i experiencing some strange behaviour with this geometry and glass material

geometry + physical glass material, rendered in maxwell

flipped geometry + physical glass material, rendered in maxwell

geometry + physical glass material, rendered in luxcore

flipped geometry + physical glass material, rendered in maxwell

[Sharlybg]

You may need to post the known geometry for efficient help.

[daros]

Ops, sorry, i edited the previous post and added the file, thanks.

[Dade]

It is not a closed surface: it is not a valid volume.

[daros]

But in complex projects it can be a huge pain for non professional modelers to archive perfectly cosed volumes for glazings like this:

So it is a great + if the render engine can deal with them as maxwell does. The same is true for flipped glass surfaces.

Often this kind of 3D models arrive from nurbs based softwares which have even bigger issues in creating perfectly closed surfaces.

[daros]

now i get this with identical scene and geometry, only camera angle varies

[daros]

this seems an issue of large glass surfaces with small thickness

[daros]

Is there a tolerance value which has to be lowered in order to get this kind of glass volume right?

[kintuX]

What app do you use?
At what scale, size & units is your object rendered?

Your "bug.obj" geo, though relatively big (~20m high) renders fine with BlenLuxCore...

[daros]

interesting... are you using bidirectional? I think scale is meters, however it should be clear looking at the scene files i attached.
Yes, i revised it is in meters.