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Recent Forum Posts

IOR vs Reflectivity ? Transparency vs Opacity? March 3, 2020, 9:08 a.m.

Opacity and transparency are two unrelated concepts. Opacity makes an object allow rays to pass through it, and the degree of opacity determines the proportion being blended. Transparency is really transmission, it enables refraction which samples objects behind the surface with a ray bend according to the index of refraction. Transparency=raytracing, Opacity=compositing.

So if you want to composite something Transparent is there are “correct” way to set the alpha channel?
I guess want you need to know is if a ray hot something in the scene or not. Is that available as an export?

RTX 2080 ti Jan. 10, 2019, 8:43 a.m.

Historically Nvidia cards have always been more stable than AMD with Houdini. Did you ever take the plunge and try it?

Nvidia RTX Jan. 10, 2019, 8:40 a.m.

2 interesting announcements at CES
1. Autodesk will have Arnold rendering accelerated by RTX cards
2. RTX laptops coming 29th Jan