GLSL 120, 130, 154...400?

General Discussion
8

Basically in your game code you could do something like:

shader_data = PTA_LVecBase4f()
for i in xrange(10):
    shader_data.pushBack(UnalignedLVecBase4f())
node.setShaderInput('shader_data', shader_data)
node.setInstanceCount(10)

In the shader, access it with:

uniform vec4 shader_data[10];
void main() {
    vec4 my_data = shader_data[gl_InstanceID];
}