How to efficiently draw a large number of different meshes, such as thousands of lines

ning_xue

I want to draw a lot of lines in 3D space, how can I increase the frame rate？

cybereality

Probably the best way is MultiMeshInstance, though this only works if the meshes are the same. You can alter some properties slightly, but they need to be basically the same mesh. I've done tests with 100,000 textured cubes and I still had like 900 fps.

ning_xue

@cybereality said: Probably the best way is MultiMeshInstance, though this only works if the meshes are the same. You can alter some properties slightly, but they need to be basically the same mesh. I've done tests with 100,000 textured cubes and I still had like 900 fps.

This method should not work, because the meshes I want to draw are different.

cybereality

Well you can change some stuff about them like the color or scale, it just has to have the same vertices.

Can you explain more about the project or post a screenshot so I can better understand?

ning_xue

@cybereality said: Well you can change some stuff about them like the color or scale, it just has to have the same vertices.

Can you explain more about the project or post a screenshot so I can better understand?

This is what I'm going to draw, thousands of rivers. All meshes are not the same. The problem is that the vertex coordinates of the mesh are also fine-tuned as the line of sight changes, I put this part of the calculation in the shader to speed up the drawing, but it's still not fast enough. Is there any other way to speed up the drawing?

cybereality

Are they animated? If they are static, you can draw them directly on a texture. The texture drawing can be slow (for thousands of lines) but once they are drawn it is super fast and it is not problem to have like hundreds of planes with drawn textures. This would only work if there is limited depth, and you can combine many lines onto one texture. Since it's still possible to have layers (as I said easily 100 or many hundreds) you can have a sort of 3D look, but drawing a new texture for each of thousands of lines would probably not be much faster.