Source Filmmaker. The Source Filmmaker (SFM) is the movie-making tool built and used by Valve to make movies inside the Source game engine. Because the SFM uses the same assets as the game, anything that exists in the game can be used in the movie, and vice versa. By utilizing the hardware rendering power of a modern gaming PC, the SFM allows storytellers to work in a what-you-see-is-what-you-get environment so they can iterate in the context of what it will feel like for the final audience. Founded 2012 · 80.6K members
80.6K members. The best post we have captured here reached
8.5K upvotes, which works out to
106 per 1,000 members.
The mix of post types among everything we have captured. Posting a link where almost nothing but images lands is wasted effort, and this is the fastest way to see it.
Answered from the posts ViralHunt holds from this community, not from Reddit's own about page.
What is r/SFM?
r/SFM ("Source Filmmaker") describes itself this way: The Source Filmmaker (SFM) is the movie-making tool built and used by Valve to make movies inside the Source game engine. Because the SFM uses the same assets as the game, anything that exists in the game can be used in the movie, and vice versa. By utilizing the hardware rendering power of a modern gaming PC, the SFM allows storytellers to work in a what-you-see-is-what-you-get environment so they can iterate in the context of what it will feel like for the final audience. It was founded in 2012 and has 80.6K members.
How many members does r/SFM have?
r/SFM has about 80.6K members. ViralHunt has tracked 300 of its posts; the biggest reached 8.5K upvotes, which is 106 per 1,000 members.
What is the most viral post on r/SFM?
"ugly sfm renders" reached 8.5K upvotes and 198 comments in 2026, the highest score among the posts we hold from r/SFM.
What subreddits are similar to r/SFM?
Communities of a comparable size we track: r/greenland, r/Leakednews, r/LetsDiscussThis, r/stevehofstetter, r/InvictaSolaris, r/StrikeAtPsyche.
What kind of posts do best on r/SFM?
Of the posts we hold, 39% are image posts and 28% are video posts.
When is the best time to post on r/SFM?
Across 300 timestamped posts we hold, the slots whose posts averaged the highest score are Sunday at 01:00 UTC (1.7K avg upvotes), Wednesday at 00:00 UTC (243 avg upvotes), Sunday at 21:00 UTC (152 avg upvotes). The busiest day is Sunday. For Reddit as a whole, see the best time to post on Reddit page.
How many upvotes does a post need to reach the top of r/SFM?
The 20th-best post we hold from r/SFM has 199 upvotes, so that is roughly the bar for the top twenty. We captured 300 posts from it in the last 30 days.
See what is climbing here before you write
ViralHunt tracks Reddit and eight other networks, records how every post grows, and puts what is taking off in front of your team in one list.
Every figure here is what ViralHunt has captured from r/SFM, not everything the
community has ever posted. We deliberately do not publish an average score: our sample is
weighted toward a community's best posts, so an average would be flattering and wrong.
Peak per 1,000 members is computed the same way for every community listed.
See how we measure.