Got a problem with the opacity in Isaac materials

[97wuxiaoyu]

I want to render a semi-transparent object in Isaac Sim that does not involve scattering or absorption—just controlled transparency via the opacity parameter. When the opacity value is set to 0, I want the object to be completely transparent, and I would like to assign this value through a texture map.

The default transparent materials in Isaac don’t fully meet my requirements. For example, when using Omni Surface with an opacity texture, there’s a visible edge, controlled by the opacity threshold, but ideally, I want a smooth transition.

If I disable opacity and use transmission to control transparency, it doesn’t achieve full transparency.

it looks darker than the other plane which doesn’t have a transparent plane over it.I already turned off the shadow cast

the transmission settings ↑

I tried creating an MDL in Substance Designer, but when I imported this MDL material into Isaac, I found that my opacity parameter was not carried over.

parameters in SD

parameters in Isaac

my mdl nodes

Please let me know how I should proceed.

[97wuxiaoyu]

I just find the solution by myself.
go to the extension window, and toggle on the “Iray” extension

then isaac will read the mdl material correctly!

[Richard3D]

Not just the IRAY Renderer, but also try the Path Tracing Renderer. RTX Interactive. There may be some issues with the default RTX Realtime, for transparent materials overlaid like this.