I have been watching tutorials and behind the scenes VFX with Blender, some very experienced artist seem to manually change the tile size depending on GPU and CPU.

However I am confused, why do they do this if there is a Blender Add-on (since 2.74) that Automatically finds the size for you. Why would they not use this add-on?

Is the add-on accurate?


Some tutorials were created before the addon.

People don't know the addon exists or just forget to enable it.

Old habits die hard, adjusting the tile size was an option you learned to adjust when starting to learn cycles. This would be the main reason more experienced blender users keep doing it manually.

I'm sure if you asked the tutorial creators, they will answer the same, and I doubt anyone will tell you the addon is inaccurate or no good.


To answer your question: Yes, it is accurate.

I have been using it for years now and it guarantees optimal performance. Especially when switching from CPU to GPU, the tiles size is always wrong, as I will forget to change it and render times suffer horribly (GPU renders super slow with a small tile size, CPU lags with a large one) I wish this was turned on by default, in years, I have not found one drawback to it. I have always heard people tried to find a good reason why it is not on by default, assuming firmly that there must be one. It can't just be optimal and automatic at the same time, right? But so far, nobody could ever show me a concrete reproducible negative effect of it.

Well, Auto Tile Size does have a drawback: It is not activated by default ;-) It should be, at the very least, activated as a addon, to show up in the render performance settings for the user to notice, that yes, there is an automatic way.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.