The name UMEMARO 3D is usually used to refer to two things: UMEMARO 3D, the dojin circle, and UMEMARO, the man behind the dojin circle.
UMEMARO 3D, the Circle
UMEMARO 3D (梅麻呂3D) is a dojin circle that specializes in CG-animated hentai. Its first release was Aya, in 2002, and the circle has released sixteen "mini-movie collections," two "Project Works," and two 3D comic since then, the most recent collection being Sexy Trainer Shoko Sugimoto, released in January 2018.
The credits for every release from Twin Succubus to OMEGA 2 identify UMEMARO as the 3D animator, HIROBON as the system programmer, and Akiwo Watanabe as the scenario writer, though the works of UMEMARO 3D are most often attributed solely to UMEMARO by the fanbase, as he likely does the bulk of the work on each release, and has done all of the work on releases where he solely credited. UMEMARO 3D projects are released primarily through DLsite and DMM, with additional websites carrying his work after a period of exclusivity on DLsite and DMM.
UMEMARO 3D releases have been self-published by UMEMARO through his company Arcadia Ltd. since 2005.
Aya was released as a set of disconnected .AVI clips that could combine into a full video, with bonuses such as wallpapers and concept renders included. Releases from Kasumi to Lewd Bomb Bust Female Teacher expanded on this distribution method, funneling the components of each release through an HTML document to be opened in a web browser. Lewd Consultation Room introduced Mackyplayer, a program that acts as a more sophisticated form of the HTML document, with the side-effect of locking the individual clips in a format readable only by the Mackyplayer container. This program, despite the DRM it instituted, allowed for more complex releases with interactive elements to them, and paved the way for two full-featured, text-based adventure games (identified as Project Works) - OMEGA and OMEGA 2. Mackyplayer was succeeded by Clickteam with the release of Cheeky Girl in 2016, featuring similar DRM restrictions.
UMEMARO 3D expanded into non-animated comics with the release of The Chiropractor in December 2014, distributed in both PDF and JPG formats.
UMEMARO, the Man
UMEMARO (梅麻呂) is the central figure of UMEMARO 3D, and often considered the sole member of the circle. He is in his 50s (having previously mentioned being 46 at some point in the late 2000s), and has been working in the 3DCG industry for most of his professional career. He identifies his hobby as being "DVD watching." His pre-UMEMARO 3D work was with forester, a 1990s 3D CG eroge company. UMEMARO once noted that the OMEGA duology was his "revenge" for having worked on Gakuen Z, a forester work with similar themes.
UMEMARO maintains a blog that is used to post production stills as work is done on upcoming UMEMARO 3D releases, as well as discuss other things that have been occurring in his life. He has been plagued with health issues relatively frequently; these health problems are often cited as a contributing factor to the subpar nature of OMEGA 2, and they have resulted in delays in production several times since.
According to the main UMEMARO 3D website (whose profile section, prior to its deletion following a website redesign, had not been updated since the late 2000s), UMEMARO uses LightWave 9 and 7.5, the FiberFX add-on, Adobe Creative Suite 3 (specifically Photoshop, Premiere, and After Effects), and Real Flow 4. His workstation setup as of March 17, 2015 included four computers: a primary PC running Windows XP for the bulk of the animating work, a second PC running Windows 7 for additional work and rendering, and another two exclusively for rendering, one running Windows 7, and the other running Windows Vista. UMEMARO also keeps a laptop in his room for web browsing when he takes breaks, and a sixth computer used exclusively for Internet-connected TV.
According to his November 1, 2014 blog post, prior to upgrading, UMEMARO did all of his rendering work on Windows XP, up until Microsoft's extended support for XP ended in April 2014, likely leaving Work in Progress as the last work rendered on Windows XP. UMEMARO's January 21, 2015 blog post revealed that he had upgraded to LightWave 11 for Semen Analysis, after his ten-year license for LW 7.5 expired. However, on March 22, UMEMARO announced that he had reverted back to LW 7.5 on an older computer, as his attempts to make LW 11 work for Semen Analysis had failed.
UMEMARO replaced his primary rendering computer with a high-end Windows 7 tower in late 2016, after his previous computer suffered from a catastrophic motherboard failure that left it completely unusable. This failure resulted in the delay of Cheeky Girl's production and release, and there was a brief data loss scare before UMEMARO discovered that the motherboard was the problem with the computer.
On June 13, 2018, UMEMARO revealed that he had upgraded to LightWave 2018.