Framebuffer bufferA = new Framebuffer(displayWidth, displayHeight, true);
Framebuffer bufferB = new Framebuffer(displayWidth, displayHeight, true);

private void renderLightRuneFx(Vec3Int coord) {
        glPushMatrix();

        double offsetX = coord.x - (player.lastTickPosX + (player.posX - player.lastTickPosX) * partialTicks) + 0.5;
        double offsetY = coord.y - (player.lastTickPosY + (player.posY - player.lastTickPosY) * partialTicks) + 5.5;
        double offsetZ = coord.z - (player.lastTickPosZ + (player.posZ - player.lastTickPosZ) * partialTicks) + 0.5;

        glTranslated(offsetX, offsetY, offsetZ);
        glColor4f(0.8f, 0.8f, 1f, 0.9f);
        glRotatef(renderTick, 0, 1, 0);
        glDisable(GL_TEXTURE_2D);

        glEnable(GL_BLEND);
        glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);

        // Render to framebuffer A
        bufferA.bindFramebuffer(false); // true = adjust viewport
        sphere.draw(2, 24, 24);

        glEnable(GL_TEXTURE_2D);

        // Render to framebuffer B, apply first blur
        ShaderHelper.useShader(ShaderHelper.GAUSSIAN_BLUR_X);
        bufferB.bindFramebuffer(false);
        ShaderHelper.setUniform(ShaderHelper.GAUSSIAN_BLUR_X, "tex", bufferA.framebufferTexture);
        glBindTexture(GL_TEXTURE_2D, bufferA.framebufferTexture);
        glDrawArrays(GL_TRIANGLES, 0, 6);

        // Render to screen, apply second blur
        ShaderHelper.useShader(ShaderHelper.GAUSSIAN_BLUR_Y);
        bufferB.unbindFramebuffer();
        ShaderHelper.setUniform(ShaderHelper.GAUSSIAN_BLUR_Y, "tex", bufferB.framebufferTexture);
        glBindTexture(GL_TEXTURE_2D, bufferB.framebufferTexture);
        glDrawArrays(GL_TRIANGLES, 0, 6);

        glDisable(GL_BLEND);
        glPopMatrix();
        ShaderHelper.releaseShader();
    }

    public static void useShader(int shader) {
        if(!useShaders())
            return;

        glUseProgram(shader);
    }



    public static void setUniform(int shader, String name, float val1, float val2) {
    //And similar overloads
        int location = glGetUniformLocation(shader, name);
        glUniform2f(location, val1, val2);
    }