DR environment BUG

[394452216@qq.com]

When the override environment is left empty, distributed rendering may encounter issues.
A: dr off
B: dr on

[394452216@qq.com]

I'll handle it simply for now.


    fn fix_env_map_dr  = (
        cr = renderers.current

        has_map = false

        if cr.bg_overrideDirect and cr.bg_texmapUseDirect and cr.bg_texmapDirect != undefined do(
            has_map = true
        )

        if cr.bg_overrideReflect and cr.bg_texmapUseReflect and cr.bg_texmapReflect != undefined do(
            has_map = true
        )

        if cr.bg_overrideRefract and cr.bg_texmapUseRefract and cr.bg_texmapRefract != undefined do(
            has_map = true
        )

        if not has_map do(
            return false
        )

        if cr.bg_overrideDirect and cr.bg_texmapDirect == undefined do(
            cr.bg_overrideDirect = false
        )

        if cr.bg_overrideReflect and cr.bg_texmapReflect == undefined do(
            cr.bg_overrideReflect = false
        )

        if cr.bg_overrideRefract and cr.bg_texmapRefract == undefined do(
            cr.bg_overrideRefract = false
        )

    )