Blender and Roblox Studio: Too Many Triangles

Roblox Studio limit: “Your mesh has too many triangles! Limit is 10000. Your mesh has 16682.”

Is there any way to fix this without destroying the quality of the mesh or breaking the mesh?

I believe cookie made a video about it. Look at YouTube.


Yeah, I saw the video, but he decimated the model. Doing that, it damaged my model and reduced the quality.