Simplify Mecabricks models in Blender
mecalego1771 started this discussion in Help and Tips

Hello,
First of all I would like to thank Mecabricks for doing such an awesome job with their addons for Blender,
it really encourages me to learn blender and try out animations.
Now, I want to render a scene in Blender where there are a total of 10 modular buildings which i downloaded from Mecabricks and imported to Blender.
But each building has around 4000 bricks which means I would have to need a high end pc or better to render the scene with all the bricks.
Here comes my question:
Is there a way to simplify the Mecabricks models inside blender, so that it will be easier to render? Maybe turning all bricks into one brick?
Things I've tried but didn't help:

  • Joining all bricks into one by using CTRL + J
  • Importing the buildings as an OBJ file
  • Adding a Decimate modifier to reducce the face count (freezes my pc)
    I would really love to continue my animation adventure but this problem keeps reappearing.
    Thanks in advance for any help!
1 reply · Page 1 of 1

Here's a thread on the Blender forums that talks about doing this:

https://blender.stackexchange.com/questions/18916/how-to-remove-interior-faces-while-keeping-exterior-faces-untouched

The second part, deleting all interior faces, hasn't worked for me yet, but I've so far only been doing it on trees and Minifigures, not buildings, so you might have more luck with that.

For the Merge by distance part, I use 0.01 as a value, to make sure I get as many vertices as possible. The default value is too small in my opinion and leaves behind many vertices that are in fact at the same spot.

I've had some luck with Decimate as well, using 0.5 to 0.3 as values, depending on the model. For things with more curved pieces, I use 0.5 but if there's more square brick stuff, 0.3 has given good results.

You'll also probably have to do just one building at a time. Modulars must have upwards of 100k vertices each or more so yeah, doing more than one at a time will likely crash and burn your PC. Load them up one at a time, save the result as a fbx or obj file and then do the next. You can then import than all into a new scene once you're reduced their complexity some.

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