Half sphere

#1 O.O

Never crashed for me. I just sliced it in the middle, and it worked fine.

#2 Yeah the slice tool. Basically you want to either use the hollow tool first then slice it in half or use the csg subtract with a copy and pasted, then reduced version for the hollow out. But yes mine crashes a bit to, so save often!

#3 Sorry, maybe i was using the wrong tool (knife). Thanks for your response

#4 I found the best way so far was to:
1.) create your sphere the size you want the dome to be. Note: be careful on how many sides and segments you use for the sphere. If it crashes set them to a lower value.
2.) use the hollow brush, set wall thickness to 0.8 or higher.
3.) create a cube large enough to cover the bottom half of the sphere and use CSG Subtract, then delete cube.
You now have a dome that will go into the engine. I noticed several times though that if you set the wall thickness lower than 0.8 you will have some faces missing, the wall thickness defaults at 0.5.

#5 There seems to be a bug with Slice tool in that particular instance. Knife and Clip appear to be okay. Its been added to the bug tracker.

#6 Couldn't you also use vertex select mode and translate all the vertices on one half of the sphere to the middle? Assuming you wanted a "half sphere".

#7 You could, but they you would have a lot of extra faces and vertices on the bottom, which might yield weird results if the shape split others during the DIF export process.