This might not be a question strictly regarding Three.js, but I seem to be unable to render on a floating point RGB texture when running the code on Firefox. Chrome works just fine. Firefox gives me this:
Framebuffer not complete. (status: 0x8cd6) COLOR_ATTACHMENT0 has an effective format of RGB32F, which is not renderable
I have tried to enable extensions
and both return non-null values, but the rendering still fails.
https://jsfiddle.net/ywptg6uj/6/ a quick fiddle.js that shows nothing but renders on an offscreen flaoting point texture. On firefox the errors will show up on the console.
EDIT: turns out WEBGL_color_buffer_float only guarantees support for RGBA32F textures and I was using RGB32F. This has nothing to do with three.js.