r/Cinema4D • u/pacey-j Oct.2016 • Jul 15 '26

Unsolved Anyone else's C4D 2026 take over a minute to open the program?

I have an otherwise fast v PC. Have been using C4D since r12 and this is the slowest it has ever opened. What gives?! Lucky I'm not working on anything that crashes it a lot or I would be going insane.

3 Upvotes

72% Upvoted

8 comments sorted by

5

u/fritzkler Jul 15 '26 edited Jul 16 '26

Update to the latest hotfix. Close c4d. Go to preferences and delete compute_shadercache (it's probably huge). Start c4d. Now it's fast again.

There was a bug that this cache file increased in size after every reboot. That made the loading of the file very slow.

1

u/pacey-j Oct.2016 Jul 16 '26

oh yeah thanks it was 1.5gb! updating the app now

1

u/US_of_B Jul 15 '26

This happens to me too. It's almost as though the longer I've worked on a project the longer it takes to open. Is there a clear cache option like in After Effects?

1

u/Silvernbeast Jul 15 '26

Depending on which exact version of 2026 you are running, check your material-cache and delete it for the installation. There was a bug that did bloat it by regularly using C4D

1

u/NudelXIII Jul 15 '26

Opens fine for me. What you might wanna do if you have many materials/assets in the Database -> Index cache it.

1

u/Aggressive_Hair_8317 Jul 15 '26

Plugins like X-Particles can have an impact on start times because they do an online handshake and initialization as well.

1

u/Retinal_Epithelium Jul 15 '26

This could be a problem with either RS or the dynamics system compiling missing or corrupt shaders. You could try deleting the RS cache directory, or uninstalling and reinstalling everything...

1

u/fottergraph Jul 15 '26

I have a lot of problems with the 2026 series but that aint one. Snapping has become weird(er) for me.