How to use MultiRenderTarget to make all the content in the scene only need to be rendered at one time and generate bbl default rendering results and user-defined rendering results (colorId is used for picking)?
I have tens of millions of meshes hoping to pick up faster this way.
I have a new idea, should I customize GeometryBufferRenderer ?
Hi Luck_Good,
Sorry, I don’t think I understand what you’re trying to achieve. MultiRenderTarget isn’t something one would typically use to speed up a single render — ThinInstance is a more conventional choice for that — and tens of millions of meshes is going to be a challenge pretty much any way you slice it, depending on your hardware.
If what you’re trying to implement is GPU picking — being able to tell which mesh the cursor is hovering over using GPU information — then you very well might be able to do this using a MultiRenderTarget, but there are additional complexities. You’ll need to either use a single material for the picking render and switch a colorId uniform on it every single draw call, or you’ll need to have a separate picking material for every mesh, which will get very heavy. Either way, you may also have trouble with running out of colorId values with “tens of millions” of meshes; RGB8 only gives you about 17 million possible colors, so you’d probably have to use alpha for this as well.
Hope this helps, and best of luck!