Opaque 3.0.4 was free to download from our software library. The program is included in Photo & Graphics Tools. This download was checked by our built-in antivirus and was rated as clean. The most frequent installation filename for the program is: Opaque.exe. Opaque is compatible with Windows XP/7/8/10/11 environment, 32-bit version. The most popular versions of the program 3.0 and 2.0. The actual developer of the free program is UCLA Dept. of Architecture and Urban Design.
From the developer:
Draws a detail of wall or roof sections, calculates U-value, Time Lag, and Decrement Factor. It plots temperature drop through the section. Draws 2-D daily and 3-D annual plots of Outdoor and Sol-Air Temperatures, Normal and Total Surface Radiation, and Heat Flow through the envelope.
It was originally called SOLAR-3.
You may want to check out more software, such as Rebelle, GrowCut or Qlock, which might be similar to Opaque.