Hi again,
1. For spotlight block, please use the format below to add style for each position inside the block:
<?php $this->spotlight('spotlight-1', 'position-1, position-2, position-3, position-4', array('style'=>'style1,style2, ...')) ?>
2. And in the template t3_bs3_blank I do not work style "t3modal"
For this question, please check if modules.php is included in folder: "templates/your_template/html". If you don't find the find, please copy the file from folder: "plugins\system\t3\base-bs3\html". Next please check if the chrom function modChrome_t3modal exists in that file. If you don't find the function, please update the function to the file.
By default, the module style (module chrome) file is included in t3 core "plugins\system\t3\base-bs3\html\modules.php" - for t3 bas3 or "plugins\system\t3\base\html\modules.php" - for t3 bs2. If you want to override the module style, please copy the modules.php in the t3 core to your template html folder then implement your customization.
Gardner.