On my device it is shaded about 0.5sec. Object in first world has color from fb.clearColorB... When you change this code
fb.clear();
fb.setRenderTarget(renderTarget);
fb.clear();
world.renderScene(fb);
world.draw(fb);
fb.display();
fb.removeRenderTarget();
fb.setRenderTarget(renderTarget2);
fb.clearColorBufferOnly(RGBColor.GREEN);
secWorld.renderScene(fb);
secWorld.draw(fb);
fb.display();
fb.removeRenderTarget();
fb.clear();
fb.blit(renderTarget2, 0, 0, 0, 0, fb.getWidth(), fb.getHeight(), FrameBuffer.OPAQUE_BLITTING);
to this
fb.clear();
world.renderScene(fb);
world.draw(fb);
secWorld.renderScene(fb);
secWorld.draw(fb);
it is what I want